fix: Drop mock STATICFILES_STORAGE_KWARGS (#38551)

The setting was misleading, because it doesn't
do anything as-is. The code that reads from this
dict uses the default of 
settings.STORAGES['staticfiles']['BACKEND'], which is
openedx.core.storage.ProductionStorage, as the key.
The data under the defined (and now removed) key
openedx.core.storage.ProductionS3Storage
would never have been used.

Author: robrap

cms/envs/mock.yml

@@ -739,10 +739,6 @@ SOCIAL_SHARING_SETTINGS:
   DASHBOARD_FACEBOOK: true
   DASHBOARD_TWITTER: true
 SOFTWARE_SECURE_RETRY_MAX_ATTEMPTS: 5
-STATICFILES_STORAGE_KWARGS:
-  openedx.core.storage.ProductionS3Storage:
-    bucket_name: static
-    default_acl: null
 STATIC_ROOT_BASE: /edx/var/edxapp/staticfiles
 STATIC_URL_BASE: /static/
 STUDIO_NAME: Studio

lms/envs/mock.yml

@@ -1108,10 +1108,6 @@ SOCIAL_SHARING_SETTINGS:
   DASHBOARD_TWITTER: true
 SOFTWARE_SECURE_RETRY_MAX_ATTEMPTS: 5
 SOFTWARE_SECURE_VERIFICATION_ROUTING_KEY: hello
-STATICFILES_STORAGE_KWARGS:
-  openedx.core.storage.ProductionS3Storage:
-    bucket_name: hello
-    default_acl: hello
 STATIC_ROOT_BASE: /tmp/static
 STATIC_URL_BASE: /static
 STUDIO_NAME: Studio
@@ -1246,4 +1242,3 @@ ZENDESK_GROUP_ID_MAPPING:
 ZENDESK_OAUTH_ACCESS_TOKEN: test_zendesk_oauth
 ZENDESK_URL: https://12345.zendesk.com
 ZENDESK_USER: daemon@example.com
-