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/status/thunderbolt.js

@@ -77,7 +77,6 @@ var Client = class {
         this.probing = this._proxy.Probing;
         if (this.probing)
             this.emit('probing-changed', this.probing);
-
     }
 
     _onPropertiesChanged(proxy, properties) {