Merge branch 'zj-n-1-merge-requests-show' into 'master'

Remove N + 1 issue for MergeRequests#show

Closes #37432 and gitaly#994

See merge request gitlab-org/gitlab-ce!16967

app/controllers/projects/merge_requests_controller.rb

@@ -50,10 +50,7 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
 
         set_pipeline_variables
 
-        # n+1: https://gitlab.com/gitlab-org/gitlab-ce/issues/37432
-        Gitlab::GitalyClient.allow_n_plus_1_calls do
-          render
-        end
+        render
       end
 
       format.json do