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/appDisplay.js

@@ -867,7 +867,6 @@ var PageManager = GObject.registerClass({
 
         global.settings.connect('changed::app-picker-layout',
             this._loadPages.bind(this));
-
     }
 
     _loadPages() {