Merge branch '57768-remove-vertical-line' into 'master'

Remove vertical connecting line placeholder from diff discussion notes

Closes #57768

See merge request gitlab-org/gitlab-ce!25292

app/assets/stylesheets/pages/notes.scss

@@ -494,11 +494,6 @@ $note-form-margin-left: 72px;
   .discussion-notes {
     margin-left: 0;
     border-left: 0;
-
-    .notes {
-      position: relative;
-      @include vertical-line(52px);
-    }
   }
 
   .note-wrapper {

changelogs/unreleased/57768-remove-vertical-line.yml

+---
+title: Remove vertical connecting line placeholder from diff discussion notes
+merge_request: 25292
+author:
+type: fixed