remove futile code

packages/app/src/components/Sidebar.module.scss

@@ -240,22 +240,6 @@
   }
 }
 
-// '&' could not be set after :global
-// workaround from https://github.com/css-modules/css-modules/issues/295#issuecomment-404873976
-.grw-sidebar :global {
-  .grw-sidebar-drawer {
-    @include drawer();
-  }
-  .grw-sidebar-dock {
-    @include bs.media-breakpoint-down(sm) {
-      @include drawer();
-    }
-    @include bs.media-breakpoint-up(md) {
-      @include dock();
-    }
-  }
-}
-
 .grw-sidebar {
   &:global {
     &.grw-sidebar-drawer {