Remove 'do not translate' comment for string 'None'.

Bug: 22278463
Change-Id: I29c288cd36cd7b65132b42a4b78749afa81064d6
diff --git a/res/values/arrays.xml b/res/values/arrays.xml
index 87d979e..97f5ead 100644
--- a/res/values/arrays.xml
+++ b/res/values/arrays.xml
@@ -593,7 +593,6 @@
 
     <!-- MVNO Info used in APN editor -->
     <string-array name="mvno_type_entries">
-        <!-- Do not translate. -->
         <item>None</item>
         <!-- Do not translate. -->
         <item>SPN</item>