style: Avoid unnecessary parentheses

The eslint check in CI is broken, and some style nits weren't caught
as a consequence.

https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/105

extensions/drive-menu/extension.js

@@ -69,7 +69,7 @@ class MountMenuItem extends PopupMenu.PopupBaseMenuItem {
     _eject() {
         let unmountArgs = [
             Gio.MountUnmountFlags.NONE,
-            (new ShellMountOperation.ShellMountOperation(this.mount)).mountOp,
+            new ShellMountOperation.ShellMountOperation(this.mount).mountOp,
             null, // Gio.Cancellable
         ];
 

extensions/places-menu/placeDisplay.js

@@ -200,7 +200,7 @@ class PlaceDeviceInfo extends PlaceInfo {
     eject() {
         let unmountArgs = [
             Gio.MountUnmountFlags.NONE,
-            (new ShellMountOperation.ShellMountOperation(this._mount)).mountOp,
+            new ShellMountOperation.ShellMountOperation(this._mount).mountOp,
             null, // Gio.Cancellable
         ];