Fix minor issues with docker_login docs (#35081)

* Fix typos in docker_login reauthorize parameter

* Remove note about docker_login email address

Docker Hub no longer requires an email address.

* Remove check for email parameter with Docker Hub

This is no longer required, so login should not fail if it's not provided.

lib/ansible/modules/cloud/docker/docker_login.py

@@ -46,11 +46,10 @@ options:
   email:
     required: False
     description:
-      - "The email address for the registry account. NOTE: private registries may not require this,
+      - "The email address for the registry account."
-        but Docker Hub requires it."
   reauthorize:
     description:
-      - Refresh exiting authentication found in the configuration file.
+      - Refresh existing authentication found in the configuration file.
     type: bool
     default: 'no'
     aliases:
@@ -98,7 +97,6 @@ EXAMPLES = '''
   docker_login:
     username: docker
     password: rekcod
-    email: docker@docker.io
 
 - name: Log into private registry and force re-authorization
   docker_login:
@@ -111,13 +109,11 @@ EXAMPLES = '''
   docker_login:
     username: docker
     password: rekcod
-    email: docker@docker.io
     config_path: /tmp/.mydockercfg
 
 - name: Log out of DockerHub
   docker_login:
     state: absent
-    email: docker@docker.com
 '''
 
 RETURN = '''
@@ -324,9 +320,6 @@ def main():
         login_result={}
     )
 
-    if client.module.params['state'] == 'present' and client.module.params['registry_url'] == DEFAULT_DOCKER_REGISTRY and not client.module.params['email']:
-        client.module.fail_json(msg="'email' is required when logging into DockerHub")
-
     LoginManager(client, results)
     if 'actions' in results:
         del results['actions']