DEV: Removal of create_post_for_category_and_tag_changes setting (#28321)

* DEV: Removal of create_post_for_category_and_tag_changes setting

reverting commit: #65f35e1
and adding a migration to remove the setting
ref: t/132320

* DEV: change checks for zeros to check for nils

* DEV: remove create_post_for_category_and_tag_changes migration file

If anything goes wrong, we can always revert back to the previous state.

config/locales/client.en.yml

@@ -177,8 +177,6 @@ en:
       removed_user: "Removed %{who} %{when}"
       removed_group: "Removed %{who} %{when}"
       autobumped: "Automatically bumped %{when}"
-      tags_changed: "Tags updated %{when}"
-      category_changed: "Category updated %{when}"
       autoclosed:
         enabled: "Closed %{when}"
         disabled: "Opened %{when}"

config/locales/server.en.yml

@@ -60,13 +60,6 @@ en:
   remove_posts_deleted_by_author: "Deleted by author"
   redirect_warning: "We were unable to verify that the link you selected was actually posted to the forum. If you wish to proceed anyway, select the link below."
   on_another_topic: "On another topic"
-
-  topic_category_changed: "From %{from} to %{to}"
-  topic_tag_changed:
-    added_and_removed: "Added %{added} and removed %{removed}"
-    added: "Added %{added}"
-    removed: "Removed %{removed}"
-
   inline_oneboxer:
     topic_page_title_post_number: "#%{post_number}"
     topic_page_title_post_number_by_user: "#%{post_number} by %{username}"
@@ -2615,7 +2608,6 @@ en:
     suppress_overlapping_tags_in_list: "If tags match exact words in topic titles, don't show the tag"
     remove_muted_tags_from_latest: "Don't show topics tagged only with muted tags in the latest topic list."
     force_lowercase_tags: "Force all new tags to be entirely lowercase."
-    create_post_for_category_and_tag_changes: "Create a small action post when a topic's category or tags change"
     automatically_clean_unused_tags: "Automatically delete tags that are not being used on any topics or private messages on a daily basis."
     watched_precedence_over_muted: "Notify me about topics in categories or tags I’m watching that also belong to one I have muted"
 

config/site_settings.yml

@@ -3223,8 +3223,6 @@ tags:
   force_lowercase_tags:
     default: true
     client: true
-  create_post_for_category_and_tag_changes:
-    default: false
   automatically_clean_unused_tags:
     default: false