Revert "FEATURE: Add post language on creating a new post (#33001)" (#33157)

This reverts commit b55af383f779d01d983a3ccf1149438aee9c6725.

lib/post_creator.rb

@@ -555,7 +555,6 @@ class PostCreator
       via_email
       raw_email
       action_code
-      locale
     ].each { |a| post.public_send("#{a}=", @opts[a]) if @opts[a].present? }
 
     post.extract_quoted_post_numbers

lib/post_revisor.rb

@@ -40,7 +40,7 @@ class PostRevisor
     end
   end
 
-  POST_TRACKED_FIELDS = %w[raw cooked edit_reason user_id wiki post_type locale]
+  POST_TRACKED_FIELDS = %w[raw cooked edit_reason user_id wiki post_type]
 
   attr_reader :category_changed, :post_revision