[gnome-builder] Remove unnecessary import.

[Christian Hergert <chergert src gnome org>]

commit acaf59d203eef10f4ab27b2ac2bdfd6b698d6fa9
Author: rockon999 <noreply evanwelsh com>
Date:   Tue Jul 31 23:37:13 2018 -0500

    Remove unnecessary import.

 src/plugins/meson-templates/resources/src/window.js.tmpl | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/plugins/meson-templates/resources/src/window.js.tmpl 
b/src/plugins/meson-templates/resources/src/window.js.tmpl
index 52e96cb41..da3affbed 100644
--- a/src/plugins/meson-templates/resources/src/window.js.tmpl
+++ b/src/plugins/meson-templates/resources/src/window.js.tmpl
@@ -1,7 +1,6 @@
 {{include "license.js"}}
 
 const { GObject, Gtk } = imports.gi;
-const Lang = imports.lang;
 
 var {{PreFix}}Window = GObject.registerClass({
     GTypeName: '{{PreFix}}Window',