Revert "Issue #2939563 by webchick: Un-hide Media from the UI. With special...

Revert "Issue #2939563 by webchick: Un-hide Media from the UI. With special thanks to all contributors to helped us get here!"

This reverts commit bab879b6.

core/modules/media/media.info.yml

@@ -4,6 +4,7 @@ type: module
 package: Core
 version: VERSION
 core: 8.x
+hidden: true
 dependencies:
   - file
   - image