[gnome-builder] menus: remove new submenu until we have additional items

[Christian Hergert <chergert src gnome org>]

commit 768559dfa0c7b80927eb8a7a6e352afaea9e0ea8
Author: Christian Hergert <chergert redhat com>
Date:   Wed Oct 10 15:05:07 2018 -0700

    menus: remove new submenu until we have additional items
    
    We will bring this back once we have plugins that use it, but right now,
    it's just a pain to dive into for a single menu item.
    
    Presumably, things like "new class" would use the submenu someday.

 src/plugins/project-tree/gtk/menus.ui | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/src/plugins/project-tree/gtk/menus.ui b/src/plugins/project-tree/gtk/menus.ui
index 6e601ec47..325f7065d 100644
--- a/src/plugins/project-tree/gtk/menus.ui
+++ b/src/plugins/project-tree/gtk/menus.ui
@@ -10,15 +10,10 @@
   </menu>
   <menu id="gb-project-tree-popup-menu">
     <section id="gb-project-tree-new-section">
-      <submenu id="gb-project-tree-new-section-submenu">
-        <attribute name="label" translatable="yes">_New</attribute>
-        <section id="gb-project-tree-new-empty-file-section">
-          <item>
-            <attribute name="label" translatable="yes">_Empty File</attribute>
-            <attribute name="action">project-tree.new-file</attribute>
-          </item>
-        </section>
-      </submenu>
+      <item>
+        <attribute name="label" translatable="yes">New _File</attribute>
+        <attribute name="action">project-tree.new-file</attribute>
+      </item>
       <item>
         <attribute name="label" translatable="yes">_New Folder</attribute>
         <attribute name="action">project-tree.new-directory</attribute>