Fixed #28606 -- Deprecated CachedStaticFilesStorage.

django/contrib/staticfiles/storage.py

@@ -3,6 +3,7 @@ import json
 import os
 import posixpath
 import re
+import warnings
 from collections import OrderedDict
 from urllib.parse import unquote, urldefrag, urlsplit, urlunsplit
 
@@ -14,6 +15,7 @@ from django.core.cache import (
 from django.core.exceptions import ImproperlyConfigured
 from django.core.files.base import ContentFile
 from django.core.files.storage import FileSystemStorage, get_storage_class
+from django.utils.deprecation import RemovedInDjango31Warning
 from django.utils.functional import LazyObject
 
 
@@ -474,7 +476,13 @@ class CachedStaticFilesStorage(CachedFilesMixin, StaticFilesStorage):
     A static file system storage backend which also saves
     hashed copies of the files it saves.
     """
-    pass
+    def __init__(self, *args, **kwargs):
+        warnings.warn(
+            'CachedStaticFilesStorage is deprecated in favor of '
+            'ManifestStaticFilesStorage.',
+            RemovedInDjango31Warning, stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)
 
 
 class ManifestStaticFilesStorage(ManifestFilesMixin, StaticFilesStorage):