Merge branch '32556-side-by-side-mr-discussion-should-stretch-to-max-width' into 'master'

Resolve "Side by side MR discussion should stretch to max width"

Closes #32556

See merge request !11508

app/assets/stylesheets/pages/issuable.scss

@@ -10,7 +10,6 @@
   .page-content-header,
   .commit-box,
   .info-well,
-  .notes,
   .commit-ci-menu,
   .files-changed {
     @extend .fixed-width-container;