Remove non-elderberry herb flavors.

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 1286 matching lines @@
       </message>
       <message name="IDS_ACCESSIBILITY_TABSTRIP_TAB" desc="Content description for the tab title.">
         <ph name="TAB_TITLE">%1$s<ex>Welcome to Facebook</ex></ph>, tab
       </message>
       <message name="IDS_ACCESSIBILITY_TABSTRIP_BTN_CLOSE_TAB" desc="Content description for the close tab button.">
         Close tab
       </message>
       <message name="IDS_TAB_LOADING_DEFAULT_TITLE" desc="The title of a tab when we are still waiting for either the URL or the real title. This generally shows when the page is first loading.">
         Loading…
       </message>
-      <message name="IDS_CLOSE_TAB_AND_RETURN" desc="Button to close the current tab and return to the calling app.">
-        Close the current tab and return to the previous app
-      </message>
 
       <!-- InfoBar -->
       <message name="IDS_INFOBAR_CLOSE" desc="Accessibility label for the dismiss infobar Button">
         Close
       </message>
       <message name="IDS_BOTTOM_BAR_SCREEN_POSITION" desc="Accessibility label to inform users about the InfoBar location">
         Options available near bottom of the screen
       </message>
 
       <!-- DownloadOverwriteInfoBar -->
@@ skipping 1268 matching lines @@
 
       <message name="IDS_INSTANT_APPS_INFO_BAR_LABEL" desc="A sub-heading describing the item as an Instant App">
         Instant app
       </message>
       <message name="IDS_INSTANT_APPS_OPEN_IN_APP" desc="Button label for the user action that will open an Instant App. [CHAR LIMIT=20]">
         Open app
       </message>
     </messages>
   </release>
 </grit>