diff --git a/src/core/server/ui_settings/integration_tests/lib/servers.ts b/src/core/server/ui_settings/integration_tests/lib/servers.ts
index b4cfc3c1efe8..04979b69b32b 100644
--- a/src/core/server/ui_settings/integration_tests/lib/servers.ts
+++ b/src/core/server/ui_settings/integration_tests/lib/servers.ts
@@ -73,9 +73,9 @@ export function getServices() {
     httpServerMock.createKibanaRequest()
   );
 
-  const uiSettings = kbnServer.server.uiSettingsServiceFactory({
-    savedObjectsClient,
-  });
+  const uiSettings = kbnServer.newPlatform.start.core.uiSettings.asScopedToClient(
+    savedObjectsClient
+  );
 
   services = {
     kbnServer,
diff --git a/src/legacy/server/kbn_server.d.ts b/src/legacy/server/kbn_server.d.ts
index 9bb091383ab1..1a1f43b93f26 100644
--- a/src/legacy/server/kbn_server.d.ts
+++ b/src/legacy/server/kbn_server.d.ts
@@ -45,7 +45,6 @@ import { LegacyConfig, ILegacyService, ILegacyInternals } from '../../core/serve
 import { UiPlugins } from '../../core/server/plugins';
 import { CallClusterWithRequest, ElasticsearchPlugin } from '../core_plugins/elasticsearch';
 import { UsageCollectionSetup } from '../../plugins/usage_collection/server';
-import { UiSettingsServiceFactoryOptions } from '../../legacy/ui/ui_settings/ui_settings_service_factory';
 import { HomeServerPluginSetup } from '../../plugins/home/server';
 
 // lot of legacy code was assuming this type only had these two methods
@@ -78,7 +77,6 @@ declare module 'hapi' {
       name: string,
       factoryFn: (request: Request) => Record<string, any>
     ) => void;
-    uiSettingsServiceFactory: (options?: UiSettingsServiceFactoryOptions) => IUiSettingsClient;
     logWithMetadata: (tags: string[], message: string, meta: Record<string, any>) => void;
     newPlatform: KbnServer['newPlatform'];
   }
diff --git a/src/legacy/ui/ui_mixin.js b/src/legacy/ui/ui_mixin.js
index 432c4f02bc3e..54da001d2066 100644
--- a/src/legacy/ui/ui_mixin.js
+++ b/src/legacy/ui/ui_mixin.js
@@ -19,10 +19,8 @@
 
 import { uiAppsMixin } from './ui_apps';
 import { uiRenderMixin } from './ui_render';
-import { uiSettingsMixin } from './ui_settings';
 
 export async function uiMixin(kbnServer) {
   await kbnServer.mixin(uiAppsMixin);
-  await kbnServer.mixin(uiSettingsMixin);
   await kbnServer.mixin(uiRenderMixin);
 }
diff --git a/src/legacy/ui/ui_render/ui_render_mixin.js b/src/legacy/ui/ui_render/ui_render_mixin.js
index 23fb6028f84d..8cc2cd1321a6 100644
--- a/src/legacy/ui/ui_render/ui_render_mixin.js
+++ b/src/legacy/ui/ui_render/ui_render_mixin.js
@@ -21,6 +21,7 @@ import { createHash } from 'crypto';
 import Boom from 'boom';
 import { i18n } from '@kbn/i18n';
 import * as UiSharedDeps from '@kbn/ui-shared-deps';
+import { KibanaRequest } from '../../../core/server';
 import { AppBootstrap } from './bootstrap';
 import { getApmConfig } from '../apm';
 
@@ -79,7 +80,10 @@ export function uiRenderMixin(kbnServer, server, config) {
         auth: authEnabled ? { mode: 'try' } : false,
       },
       async handler(request, h) {
-        const uiSettings = request.getUiSettingsService();
+        const soClient = kbnServer.newPlatform.start.core.savedObjects.getScopedClient(
+          KibanaRequest.from(request)
+        );
+        const uiSettings = kbnServer.newPlatform.start.core.uiSettings.asScopedToClient(soClient);
 
         const darkMode =
           !authEnabled || request.auth.isAuthenticated
diff --git a/src/legacy/ui/ui_settings/index.js b/src/legacy/ui/ui_settings/index.js
deleted file mode 100644
index ec3122c4e390..000000000000
--- a/src/legacy/ui/ui_settings/index.js
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Licensed to Elasticsearch B.V. under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch B.V. licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-export { uiSettingsMixin } from './ui_settings_mixin';
diff --git a/src/legacy/ui/ui_settings/integration_tests/ui_settings_mixin.test.ts b/src/legacy/ui/ui_settings/integration_tests/ui_settings_mixin.test.ts
deleted file mode 100644
index 84a64d3f46f1..000000000000
--- a/src/legacy/ui/ui_settings/integration_tests/ui_settings_mixin.test.ts
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Licensed to Elasticsearch B.V. under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch B.V. licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import sinon from 'sinon';
-import expect from '@kbn/expect';
-
-import { savedObjectsClientMock } from '../../../../core/server/mocks';
-import * as uiSettingsServiceFactoryNS from '../ui_settings_service_factory';
-import * as getUiSettingsServiceForRequestNS from '../ui_settings_service_for_request';
-// @ts-ignore
-import { uiSettingsMixin } from '../ui_settings_mixin';
-
-interface Decorators {
-  server: { [name: string]: any };
-  request: { [name: string]: any };
-}
-
-const uiSettingDefaults = {
-  application: {
-    defaultProperty1: 'value1',
-  },
-};
-
-describe('uiSettingsMixin()', () => {
-  const sandbox = sinon.createSandbox();
-
-  function setup() {
-    // maps of decorations passed to `server.decorate()`
-    const decorations: Decorators = {
-      server: {},
-      request: {},
-    };
-
-    // mock hapi server
-    const server = {
-      log: sinon.stub(),
-      route: sinon.stub(),
-      addMemoizedFactoryToRequest(name: string, factory: (...args: any[]) => any) {
-        this.decorate('request', name, function (this: typeof server) {
-          return factory(this);
-        });
-      },
-      decorate: sinon.spy((type: keyof Decorators, name: string, value: any) => {
-        decorations[type][name] = value;
-      }),
-      newPlatform: {
-        setup: {
-          core: {
-            uiSettings: {
-              register: sinon.stub(),
-            },
-          },
-        },
-      },
-    };
-
-    // "promise" returned from kbnServer.ready()
-    const readyPromise = {
-      then: sinon.stub(),
-    };
-
-    const kbnServer = {
-      server,
-      uiExports: { uiSettingDefaults },
-      ready: sinon.stub().returns(readyPromise),
-    };
-
-    uiSettingsMixin(kbnServer, server);
-
-    return {
-      kbnServer,
-      server,
-      decorations,
-      readyPromise,
-    };
-  }
-
-  afterEach(() => sandbox.restore());
-
-  it('passes uiSettingsDefaults to the new platform', () => {
-    const { server } = setup();
-    sinon.assert.calledOnce(server.newPlatform.setup.core.uiSettings.register);
-    sinon.assert.calledWithExactly(
-      server.newPlatform.setup.core.uiSettings.register,
-      uiSettingDefaults
-    );
-  });
-
-  describe('server.uiSettingsServiceFactory()', () => {
-    it('decorates server with "uiSettingsServiceFactory"', () => {
-      const { decorations } = setup();
-      expect(decorations.server).to.have.property('uiSettingsServiceFactory').a('function');
-
-      const uiSettingsServiceFactoryStub = sandbox.stub(
-        uiSettingsServiceFactoryNS,
-        'uiSettingsServiceFactory'
-      );
-      sinon.assert.notCalled(uiSettingsServiceFactoryStub);
-      decorations.server.uiSettingsServiceFactory();
-      sinon.assert.calledOnce(uiSettingsServiceFactoryStub);
-    });
-
-    it('passes `server` and `options` argument to factory', () => {
-      const { decorations, server } = setup();
-      expect(decorations.server).to.have.property('uiSettingsServiceFactory').a('function');
-
-      const uiSettingsServiceFactoryStub = sandbox.stub(
-        uiSettingsServiceFactoryNS,
-        'uiSettingsServiceFactory'
-      );
-
-      sinon.assert.notCalled(uiSettingsServiceFactoryStub);
-
-      const savedObjectsClient = savedObjectsClientMock.create();
-      decorations.server.uiSettingsServiceFactory({
-        savedObjectsClient,
-      });
-      sinon.assert.calledOnce(uiSettingsServiceFactoryStub);
-      sinon.assert.calledWithExactly(uiSettingsServiceFactoryStub, server as any, {
-        savedObjectsClient,
-      });
-    });
-  });
-
-  describe('request.getUiSettingsService()', () => {
-    it('exposes "getUiSettingsService" on requests', () => {
-      const { decorations } = setup();
-      expect(decorations.request).to.have.property('getUiSettingsService').a('function');
-
-      const getUiSettingsServiceForRequestStub = sandbox.stub(
-        getUiSettingsServiceForRequestNS,
-        'getUiSettingsServiceForRequest'
-      );
-      sinon.assert.notCalled(getUiSettingsServiceForRequestStub);
-      decorations.request.getUiSettingsService();
-      sinon.assert.calledOnce(getUiSettingsServiceForRequestStub);
-    });
-
-    it('passes request to getUiSettingsServiceForRequest', () => {
-      const { server, decorations } = setup();
-      expect(decorations.request).to.have.property('getUiSettingsService').a('function');
-
-      const getUiSettingsServiceForRequestStub = sandbox.stub(
-        getUiSettingsServiceForRequestNS,
-        'getUiSettingsServiceForRequest'
-      );
-      sinon.assert.notCalled(getUiSettingsServiceForRequestStub);
-      const request = {};
-      decorations.request.getUiSettingsService.call(request);
-      sinon.assert.calledWith(getUiSettingsServiceForRequestStub, server as any, request as any);
-    });
-  });
-
-  describe('server.uiSettings()', () => {
-    it('throws an error, links to pr', () => {
-      const { decorations } = setup();
-      expect(decorations.server).to.have.property('uiSettings').a('function');
-      expect(() => {
-        decorations.server.uiSettings();
-      }).to.throwError('http://github.com' as any); // incorrect typings
-    });
-  });
-});
diff --git a/src/legacy/ui/ui_settings/ui_exports_consumer.js b/src/legacy/ui/ui_settings/ui_exports_consumer.js
deleted file mode 100644
index d2bb3a00ce0e..000000000000
--- a/src/legacy/ui/ui_settings/ui_exports_consumer.js
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Licensed to Elasticsearch B.V. under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch B.V. licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-/**
- *  The UiExports class accepts consumer objects that it consults while
- *  trying to consume all of the `uiExport` declarations provided by
- *  plugins.
- *
- *  UiExportConsumer is instantiated and passed to UiExports, then for
- *  every `uiExport` declaration the `exportConsumer(type)` method is
- *  with the key of the declaration. If this consumer knows how to handle
- *  that key we return a function that will be called with the plugins
- *  and values of all declarations using that key.
- *
- *  With this, the consumer merges all of the declarations into the
- *  _uiSettingDefaults map, ensuring that there are not collisions along
- *  the way.
- *
- *  @class UiExportsConsumer
- */
-export class UiExportsConsumer {
-  _uiSettingDefaults = {};
-
-  exportConsumer(type) {
-    switch (type) {
-      case 'uiSettingDefaults':
-        return (plugin, settingDefinitions) => {
-          Object.keys(settingDefinitions).forEach((key) => {
-            if (key in this._uiSettingDefaults) {
-              throw new Error(`uiSettingDefaults for key "${key}" are already defined`);
-            }
-
-            this._uiSettingDefaults[key] = settingDefinitions[key];
-          });
-        };
-    }
-  }
-
-  /**
-   *  Get the map of uiSettingNames to "default" specifications
-   *  @return {Object<String,UiSettingsDefault>}
-   */
-  getUiSettingDefaults() {
-    return this._uiSettingDefaults;
-  }
-}
diff --git a/src/legacy/ui/ui_settings/ui_settings_mixin.js b/src/legacy/ui/ui_settings/ui_settings_mixin.js
deleted file mode 100644
index 8190b67732da..000000000000
--- a/src/legacy/ui/ui_settings/ui_settings_mixin.js
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Licensed to Elasticsearch B.V. under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch B.V. licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import { uiSettingsServiceFactory } from './ui_settings_service_factory';
-import { getUiSettingsServiceForRequest } from './ui_settings_service_for_request';
-
-export function uiSettingsMixin(kbnServer, server) {
-  const { uiSettingDefaults = {} } = kbnServer.uiExports;
-  const mergedUiSettingDefaults = Object.keys(uiSettingDefaults).reduce((acc, currentKey) => {
-    const defaultSetting = uiSettingDefaults[currentKey];
-    const updatedDefaultSetting = {
-      ...defaultSetting,
-    };
-    if (typeof defaultSetting.options === 'function') {
-      updatedDefaultSetting.options = defaultSetting.options(server);
-    }
-    if (typeof defaultSetting.value === 'function') {
-      updatedDefaultSetting.value = defaultSetting.value(server);
-    }
-    acc[currentKey] = updatedDefaultSetting;
-    return acc;
-  }, {});
-
-  server.newPlatform.setup.core.uiSettings.register(mergedUiSettingDefaults);
-
-  server.decorate('server', 'uiSettingsServiceFactory', (options = {}) => {
-    return uiSettingsServiceFactory(server, options);
-  });
-
-  server.addMemoizedFactoryToRequest('getUiSettingsService', (request) => {
-    return getUiSettingsServiceForRequest(server, request);
-  });
-
-  server.decorate('server', 'uiSettings', () => {
-    throw new Error(`
-      server.uiSettings has been removed, see https://github.com/elastic/kibana/pull/12243.
-    `);
-  });
-}
diff --git a/src/legacy/ui/ui_settings/ui_settings_service_factory.ts b/src/legacy/ui/ui_settings/ui_settings_service_factory.ts
deleted file mode 100644
index 6c3c50d175dc..000000000000
--- a/src/legacy/ui/ui_settings/ui_settings_service_factory.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Licensed to Elasticsearch B.V. under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch B.V. licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import { Legacy } from 'kibana';
-import { IUiSettingsClient, SavedObjectsClientContract } from 'src/core/server';
-
-export interface UiSettingsServiceFactoryOptions {
-  savedObjectsClient: SavedObjectsClientContract;
-}
-/**
- *  Create an instance of UiSettingsClient that will use the
- *  passed `savedObjectsClient` to communicate with elasticsearch
- *
- *  @return {IUiSettingsClient}
- */
-export function uiSettingsServiceFactory(
-  server: Legacy.Server,
-  options: UiSettingsServiceFactoryOptions
-): IUiSettingsClient {
-  return server.newPlatform.start.core.uiSettings.asScopedToClient(options.savedObjectsClient);
-}
diff --git a/src/legacy/ui/ui_settings/ui_settings_service_for_request.ts b/src/legacy/ui/ui_settings/ui_settings_service_for_request.ts
deleted file mode 100644
index 057fc64c9ebd..000000000000
--- a/src/legacy/ui/ui_settings/ui_settings_service_for_request.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Licensed to Elasticsearch B.V. under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch B.V. licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import { Legacy } from 'kibana';
-import { IUiSettingsClient } from 'src/core/server';
-import { uiSettingsServiceFactory } from './ui_settings_service_factory';
-
-/**
- *  Get/create an instance of UiSettingsService bound to a specific request.
- *  Each call is cached (keyed on the request object itself) and subsequent
- *  requests will get the first UiSettingsService instance even if the `options`
- *  have changed.
- *
- *  @param {Hapi.Server} server
- *  @param {Hapi.Request} request
- *  @param {Object} [options={}]
-
- *  @return {IUiSettingsClient}
- */
-export function getUiSettingsServiceForRequest(
-  server: Legacy.Server,
-  request: Legacy.Request
-): IUiSettingsClient {
-  const savedObjectsClient = request.getSavedObjectsClient();
-  return uiSettingsServiceFactory(server, { savedObjectsClient });
-}