message: refactor(docs-infra): remove unused styles from `_sidenav.scss`
  This commit removes some styles from `_sidenav.scss` that are no longer
  used (i.e. either their CSS selectors do not match any element in the
  app or they are overridden by other rules).
  PR Close
diff: @@ -19,10 +19,6 @@ aio-nav-menu {
  ul, a {
  margin: 0;
  }
  -
  - aio-nav-item div a {
  - padding-left: 6px;
  - }
  }
  mat-sidenav.mat-sidenav.sidenav {
  @@ -51,8 +47,7 @@ mat-sidenav-container.sidenav-container {
  }
  }
  -mat-sidenav-container.sidenav-container.mat-drawer-container.mat-sidenav-container,
  -mat-sidenav-container .sidenav-content {
  +mat-sidenav-container.sidenav-container.mat-drawer-container.mat-sidenav-container {
  background-color: $white;
  }
  @@ -179,18 +174,6 @@ button.vertical-menu-item {
  }
  }
  -aio-nav-menu.top-menu {
  - padding: 24px 0 0;
  -
  - aio-nav-item:last-child div {
  - border-bottom: 1px solid rgba($mediumgray, 0.5);
  - }
  -
  - aio-nav-item:first-child div {
  - border-top: 1px solid rgba($mediumgray, 0.5);
  - }
  -}
  -
  // Angular Version Selector
  mat-sidenav .doc-version {
  padding: 8px;
  