message: Remove highlighted issue comments feature
  This has been implemented by GitHub. Fixes
diff: @@ -460,32 +460,6 @@ td.js-line-comments:last-child .timeline-comment-actions .add-reaction-popover::
  margin-left: 5px;
  }
  -/* Highlight linked comment */
  -:root [id^='issuecomment']:target .timeline-comment {
  - border-color: #e5d999;
  -}
  -:root [id^='issuecomment']:target .timeline-comment.current-user::before {
  - border-right-color: #e5d999;
  -}
  -:root [id^='issuecomment']:target .timeline-comment.current-user::after {
  - border-right-color: #fffdef;
  -}
  -:root [id^='issuecomment']:target .timeline-comment-header {
  - background-color: #fffdef;
  - border-bottom-color: #e5d999;
  -}
  -:root [id^='issuecomment']:target .comment-reactions.has-reactions {
  - border-top-color: #e5d999;
  -}
  -:root [id^='issuecomment']:target .reaction-summary-item {
  - border-right-color: #e5d999;
  -}
  -:root [id^='issuecomment']:target .previewable-comment-form .comment-form-head.tabnav {
  - color: #e5d999;
  - background-color: #fffdef;
  - border-bottom-color: #e5d999;
  -}
  -
  /* Highlighted linked review comment */
  :root .review-comment:target {
  background-color: #fffdef;
  