cleanup: Remove empty leading/trailing lines in blocks

gjs added a new rule to its eslint ruleset that forbids "block padding",
so make sure we conform to that rule before syncing up the configuration.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1498

js/ui/userWidget.js

@@ -222,7 +222,6 @@ class UserWidget extends St.BoxLayout {
                 opacity: 0,
             });
             this.add_child(this._label);
-
         }
 
         this._updateUser();