Clean CHANGELOG_PENDING.md after v3.15.0 (#8229)

CHANGELOG_PENDING.md

@@ -1,40 +1,4 @@
 ### Improvements
 
-- [automation/python] - Use `rstrip` rather than `strip` for the sake of indentation
-  [#8160](https://github.com/pulumi/pulumi/pull/8160)
-- [codegen/nodejs] - Add helper function forms `$fnOutput` that accept
-  `Input`s, return an `Output`, and wrap the underlying `$fn` call.
-  This change addreses
-  [#5758](https://github.com/pulumi/pulumi/issues/5758) for NodeJS,
-  making it easier to compose functions/datasources with Pulumi
-  resources.
-  [#8047](https://github.com/pulumi/pulumi/pull/8047)
-
-- [sdk/dotnet] - Update SDK to support the upcoming codegen feature that
-  will enable functions to accept Outputs
-  ([5758](https://github.com/pulumi/pulumi/issues/5758)). Specifically
-  add `Pulumi.DeploymentInstance.Invoke` and remove the now redundant
-  `Pulumi.Utilities.CodegenUtilities`.
-  [#8142](https://github.com/pulumi/pulumi/pull/8142)
-
-- [cli] - Upgrade CLI to go1.17
-  [#8171](https://github.com/pulumi/pulumi/pull/8171)
-
-- [codegen/go] Register input types for schema object types.
-  [#7959](https://github.com/pulumi/pulumi/pull/7959)
-  
-- [codegen/go] Register input types for schema resource and enum types.
-  [#8204]((https://github.com/pulumi/pulumi/pull/8204))
-
-- [codegen/go] Add schema flag to disable registering input types.
-  [#8198](https://github.com/pulumi/pulumi/pull/8198)
 
 ### Bug Fixes
-
-- [codegen/go] - Use `importBasePath` before `name` if specified for name 
-  and path.
-  [#8159](https://github.com/pulumi/pulumi/pull/8159)
-  [#8187](https://github.com/pulumi/pulumi/pull/8187)
-
-- [auto/go] - Mark entire exported map as secret if key in map is secret.
-  [#8179](https://github.com/pulumi/pulumi/pull/8179)