remove full css workaround

Author: jtpio

packages/notebook-extension/style/base.css

@@ -52,12 +52,6 @@ body[data-notebook='notebooks']
   min-height: 100px;
 }
 
-/* Workaround for disabling the full windowing mode */
-body[data-notebook='notebooks']
-  .jp-Toolbar-item[data-jp-item-name='scrollbar'] {
-  display: none;
-}
-
 /* Fix background colors */
 
 body[data-notebook='notebooks'] .jp-WindowedPanel-outer > * {