code cleanup (#3210)

* code cleanup

* rollback changes

* remove dead code

* remove debug app config

* cleanup unused locales

* no-unused-vars rule

* test fixes and cleanup

* remove unnecessary translate modules

projects/aca-content/assets/i18n/en.json

@@ -479,16 +479,6 @@
             "CANCEL": "Cancel",
             "UPLOAD": "Upload"
         },
-        "FORM": {
-            "SUBTITLE": "What level of changes were made to this version?",
-            "VERSION": {
-                "MINOR": "Minor (#.1)",
-                "MAJOR": "Major (2.0)"
-            },
-            "COMMENT": {
-                "PLACEHOLDER": "Add notes describing what changed"
-            }
-        },
         "SELECTION": {
             "EMPTY": "Please choose a document to see the versions of it.",
             "NO_PERMISSION": "You don't have permission to manage the versions of this content."