Fix help for GalleryGoogle builds

 Bug: 9886976

Change-Id: I23fc78b924f3757f8ab12f84d3a0c97c1adc2333
(cherry picked from commit 7a43c8c3b85d6f9162651d8ed8b3a11a87490824)
diff --git a/res/values/strings.xml b/res/values/strings.xml
index cb4bc18..c110e79 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -492,9 +492,6 @@
     <!-- The title of the menu item which display online help in browser. [CHAR LIMIT=20]-->
     <string name="help">Help</string>
 
-    <!-- Web address for gallery help.  DO NOT TRANSLATE -->
-    <string name="help_url_gallery_main" translatable="false"></string>
-
     <!-- The tilte of a dialog showing there is no external storage. [CHAR LIMIT=20] -->
     <string name="no_external_storage_title">No Storage</string>