message: fix(toc): removing wrong spacing for horizontal rule
  ### Related Ticket(s)
  [Callout quote] On DotcomShell story, above the link no spacing
  ### Description
  This margin was interfering with all `hr` elements inside the TOC. Plus I didn't find anything related to this being necessary for any of the visual specs.
diff: @@ -79,13 +79,6 @@ $hover-transition-timing: 95ms;
  .#{$prefix}--tableofcontents {
  text-size-adjust: 100%;
  - .#{$prefix}--hr {
  - margin-top: $layout-02;
  - margin-bottom: 0;
  -
  - @include hang;
  - }
  -
  @include themed-items;
  }
  