refactor: remove dict-based overrides, use direct setting variables

Author: mfarhan943

course_discovery/settings/base.py

@@ -580,14 +580,7 @@
 EMAIL_USE_TLS = False
 EXTRA_APPS = []
 SESSION_EXPIRE_AT_BROWSER_CLOSE = False
-STORAGES = {
-    "default": {
-        "BACKEND": "django.core.files.storage.FileSystemStorage",
-    },
-    "staticfiles": {
-        "BACKEND": "django.contrib.staticfiles.storage.StaticFilesStorage",
-    },
-}
+STATICFILES_STORAGE = "django.contrib.staticfiles.storage.StaticFilesStorage"
 CACHES = {
     'default': {
         'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',