Remove deprecated "facts" aliases (ansible-collections#814)

Remove deprecated "facts" aliases

SUMMARY
Modules named "facts.py" that do not return ansible_facts were renamed to "info.py" in 2.9. Remove these aliases now that the deprecation period is over.
This PR should be included in 3.0.0 of the collection.
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME
*_facts.py

Reviewed-by: Mark Chappell <None>
Reviewed-by: Jill R <None>
Reviewed-by: None <None>

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@68aaa70

plugins/modules/rds_instance_info.py

@@ -15,7 +15,6 @@
 short_description: obtain information about one or more RDS instances
 description:
   - Obtain information about one or more RDS instances.
-  - This module was called C(rds_instance_facts) before Ansible 2.9. The usage did not change.
 options:
   db_instance_identifier:
     description:
@@ -398,8 +397,6 @@ def main():
         argument_spec=argument_spec,
         supports_check_mode=True,
     )
-    if module._name == 'rds_instance_facts':
-        module.deprecate("The 'rds_instance_facts' module has been renamed to 'rds_instance_info'", date='2021-12-01', collection_name='community.aws')
 
     conn = module.client('rds', retry_decorator=AWSRetry.jittered_backoff(retries=10))