Remove upstreamed grace helper

See https://trisquel.info/en/issues/20736 for further details

helpers/DATA/app-install-data-ubuntu/09_app_install_entry.patch

@@ -1,46 +0,0 @@
-Index: gnome-menus-2.28.0/layout/applications.menu
-===================================================================
---- gnome-menus-2.28.0.orig/layout/applications.menu	2009-09-24 11:34:44.000000000 +0200
-+++ gnome-menus-2.28.0/layout/applications.menu	2009-09-24 11:34:44.000000000 +0200
-@@ -157,4 +157,29 @@
-     <Directory>Debian.directory</Directory>
-   </Menu>
- 
-+<Include>
-+  <Filename>gnome-app-install.desktop</Filename>
-+</Include>
-+
-+<!-- Separator between menus and gnome-app-install -->
-+<Layout>
-+  <Merge type="menus"/>
-+  <Menuname>Internet</Menuname>
-+  <Menuname>Office</Menuname>
-+  <Menuname>Education</Menuname>
-+  <Menuname>Development</Menuname>
-+  <Menuname>Graphics</Menuname>
-+  <Menuname>Multimedia</Menuname>
-+  <Menuname>Games</Menuname>
-+  <Menuname>Accessories</Menuname>
-+  <Menuname>System</Menuname>
-+  <Menuname>Universal Access</Menuname>
-+  <Menuname>Debian</Menuname>
-+  <Menuname>Other</Menuname>
-+  <Menuname>wine-wine</Menuname>
-+  <Merge type="files"/>
-+  <Separator/>
-+  <Filename>gnome-app-install.desktop</Filename>
-+</Layout>
-+
- </Menu> <!-- End Applications -->
-Index: gnome-menus-2.28.0/layout/settings.menu
-===================================================================
---- gnome-menus-2.28.0.orig/layout/settings.menu	2009-09-24 11:34:47.000000000 +0200
-+++ gnome-menus-2.28.0/layout/settings.menu	2009-09-24 11:35:22.000000000 +0200
-@@ -43,6 +43,7 @@
-       <And>
-         <Category>Settings</Category>
-         <Category>System</Category>
-+        <Not><Filename>gnome-app-install.desktop</Filename></Not>
-       </And>
-     </Include>
-   </Menu>     <!-- End System Settings -->