Removed stages loop for a single 'Stages' header

app/views/projects/commit/_pipelines_list.haml

@@ -8,13 +8,7 @@
         %tbody
           %th Status
           %th Commit
-          - pipelines.stages.each do |stage|
-            %th.stage
-              - if stage.titleize.length > 12
-                %span.has-tooltip{ title: "#{stage.titleize}" }
-                  = stage.titleize
-              - else
-                = stage.titleize
+          %th Stages
           %th
           %th
         = render pipelines, commit_sha: true, stage: true, allow_retry: true, stages: pipelines.stages, status_icon_only: true, hide_branch: true