Remove custom windowing plugin

packages/notebook-extension/src/index.ts

@@ -563,31 +563,6 @@ const editNotebookMetadata: JupyterFrontEndPlugin<void> = {
   },
 };
 
-/**
- * A plugin to set the default windowing mode for the notebook
- * TODO: remove
- */
-const windowing: JupyterFrontEndPlugin<void> = {
-  id: '@jupyter-notebook/notebook-extension:windowing',
-  autoStart: true,
-  requires: [ISettingRegistry],
-  activate: (app: JupyterFrontEnd, settingRegistry: ISettingRegistry): void => {
-    // default to `none` to avoid notebook rendering glitches
-    const settings = settingRegistry.load(
-      '@jupyterlab/notebook-extension:tracker'
-    );
-    Promise.all([settings, app.restored])
-      .then(([settings]) => {
-        if (settings.user.windowing === undefined) {
-          void settings.set('windowingMode', 'defer');
-        }
-      })
-      .catch((reason: Error) => {
-        console.error(reason.message);
-      });
-  },
-};
-
 /**
  * Export the plugins as default.
  */
@@ -601,7 +576,6 @@ const plugins: JupyterFrontEndPlugin<any>[] = [
   scrollOutput,
   tabIcon,
   trusted,
-  windowing,
 ];
 
 export default plugins;