Merge branch 'kerrizor/remove-unsued-helpers' into 'master'

Remove unused helper method

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/132249



Merged-by: Heinrich Lee Yu <heinrich@gitlab.com>
Approved-by: Heinrich Lee Yu <heinrich@gitlab.com>
Co-authored-by: Kerri Miller <kerrizor@kerrizor.com>

app/helpers/merge_requests_helper.rb

@@ -78,10 +78,6 @@ def target_projects(project)
       .execute(include_routes: true)
   end
 
-  def merge_request_button_visibility(merge_request, closed)
-    return 'hidden' if merge_request_button_hidden?(merge_request, closed)
-  end
-
   def merge_request_button_hidden?(merge_request, closed)
     merge_request.closed? == closed || (merge_request.merged? == closed && !merge_request.closed?) || merge_request.closed_or_merged_without_fork?
   end