Revert "Merge branch 'jivl-add-top-margin-related-merge-requests' into 'master'"

This reverts merge request !19379

app/views/projects/issues/_merge_requests.html.haml

 - if @merge_requests.any?
-  .prepend-top-default
-    %h2.merge-requests-title
-      = pluralize(@merge_requests.count, 'Related Merge Request')
-    %ul.unstyled-list.related-merge-requests
-      - has_any_head_pipeline = @merge_requests.any?(&:head_pipeline_id)
-      - @merge_requests.each do |merge_request|
-        %li
-          %span.merge-request-ci-status
-            - if merge_request.head_pipeline
-              = render_pipeline_status(merge_request.head_pipeline)
-            - elsif has_any_head_pipeline
-              = icon('blank fw')
-          %span.merge-request-id
-            = merge_request.to_reference
-          %span.merge-request-info
-            %strong
-              = link_to merge_request.title, merge_request_path(merge_request), class: "row_title"
-            - unless @issue.project.id == merge_request.target_project.id
-              in
-              - project = merge_request.target_project
-              = link_to project.full_name, project_path(project)
+  %h2.merge-requests-title
+    = pluralize(@merge_requests.count, 'Related Merge Request')
+  %ul.unstyled-list.related-merge-requests
+    - has_any_head_pipeline = @merge_requests.any?(&:head_pipeline_id)
+    - @merge_requests.each do |merge_request|
+      %li
+        %span.merge-request-ci-status
+          - if merge_request.head_pipeline
+            = render_pipeline_status(merge_request.head_pipeline)
+          - elsif has_any_head_pipeline
+            = icon('blank fw')
+        %span.merge-request-id
+          = merge_request.to_reference
+        %span.merge-request-info
+          %strong
+            = link_to merge_request.title, merge_request_path(merge_request), class: "row_title"
+          - unless @issue.project.id == merge_request.target_project.id
+            in
+            - project = merge_request.target_project
+            = link_to project.full_name, project_path(project)
 
-          - if merge_request.merged?
-            %span.merge-request-status.prepend-left-10.merged
-              Merged
-          - elsif merge_request.closed?
-            %span.merge-request-status.prepend-left-10.closed
-              Closed
-          - else
-            %span.merge-request-status.prepend-left-10.open
-              Open
+        - if merge_request.merged?
+          %span.merge-request-status.prepend-left-10.merged
+            Merged
+        - elsif merge_request.closed?
+          %span.merge-request-status.prepend-left-10.closed
+            Closed
+        - else
+          %span.merge-request-status.prepend-left-10.open
+            Open
 
-      - if @closed_by_merge_requests.present?
-        %li
-          = render partial: 'projects/issues/closed_by_box', locals: {merge_request_count: @merge_requests.count}
+    - if @closed_by_merge_requests.present?
+      %li
+        = render partial: 'projects/issues/closed_by_box', locals: {merge_request_count: @merge_requests.count}