Remove utilities .gl-lg-w-25p for gitlab-ui

app/assets/stylesheets/utilities.scss

@@ -298,13 +298,6 @@ $gl-line-height-42: px-to-rem(42px);
   @include gl-focus($gl-border-size-1, $gray-900, true);
 }
 
-// Will be moved to @gitlab/ui by https://gitlab.com/gitlab-org/gitlab-ui/-/issues/1637
-.gl-lg-w-25p {
-  @include gl-media-breakpoint-up(lg) {
-    width: 25%;
-  }
-}
-
 // Will be moved to @gitlab/ui by https://gitlab.com/gitlab-org/gitlab-ui/-/merge_requests/2600
 .gl-pr-10 {
   padding-right: $gl-spacing-scale-10;