remove #page-wrapper

packages/app/src/components/Theme/ThemeIsland.module.scss

@@ -97,7 +97,6 @@ $color-themelight: rgba(183, 226, 219, 1);
     background: lighten($color-themelight, 5%);
   }
 
-  #wrapper > #page-wrapper,
   .page-editor-preview-container {
     background-image: url('/images/themes/island/island.png');
     background-attachment: fixed;