Remove thread vars usage from API notes and mr's

app/observers/note_observer.rb

@@ -5,7 +5,7 @@ class NoteObserver < BaseObserver
     # Skip system notes, like status changes and cross-references.
     # Skip wall notes to prevent spamming of dashboard
     if note.noteable_type.present? && !note.system
-      event_service.leave_note(note, current_user)
+      event_service.leave_note(note, note.author)
     end
 
     unless note.system?
@@ -18,6 +18,6 @@ class NoteObserver < BaseObserver
   end
 
   def after_update(note)
-    note.notice_added_references(note.project, current_user)
+    note.notice_added_references(note.project, note.author)
   end
 end

lib/api/merge_requests.rb

@@ -184,7 +184,6 @@ module API
       #   POST /projects/:id/merge_request/:merge_request_id/comments
       #
       post ":id/merge_request/:merge_request_id/comments" do
-        set_current_user_for_thread do
         required_attributes! [:note]
 
         merge_request = user_project.merge_requests.find(params[:merge_request_id])
@@ -198,7 +197,5 @@ module API
         end
       end
     end
-
-    end
   end
 end

lib/api/notes.rb

@@ -41,7 +41,6 @@ module API
       # Example Request:
       #   POST /projects/:id/notes
       post ":id/notes" do
-        set_current_user_for_thread do
         required_attributes! [:body]
 
         @note = user_project.notes.new(note: params[:body])
@@ -55,7 +54,6 @@ module API
           not_found!
         end
       end
-      end
 
       NOTEABLE_TYPES.each do |noteable_type|
         noteables_str = noteable_type.to_s.underscore.pluralize
@@ -99,7 +97,6 @@ module API
         #   POST /projects/:id/issues/:noteable_id/notes
         #   POST /projects/:id/snippets/:noteable_id/notes
         post ":id/#{noteables_str}/:#{noteable_id_str}/notes" do
-          set_current_user_for_thread do
           required_attributes! [:body]
 
           @noteable = user_project.send(:"#{noteables_str}").find(params[:"#{noteable_id_str}"])
@@ -116,5 +113,4 @@ module API
       end
     end
   end
-  end
 end