Revert "Add forever cacheable files and ..."

This reverts commit b2bec17.

Upon deployment, the change to the Whitenoise setting produced an
Internal server error

Issue Ref: #49

ab_back_end/settings.py

@@ -254,7 +254,7 @@ def skip_static_requests(record):
     'django.contrib.staticfiles.finders.FileSystemFinder',
     'django.contrib.staticfiles.finders.AppDirectoriesFinder',
 ]
-STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'
+STATICFILES_STORAGE = 'whitenoise.storage.CompressedStaticFilesStorage'
 
 # Media Files
 MEDIA_URL = '/media/'