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/misc/introspect.js

@@ -170,7 +170,6 @@ var IntrospectService = class {
         for (let app of apps) {
             let windows = app.get_windows();
             for (let window of windows) {
-
                 if (!this._isEligibleWindow(window))
                     continue;