Remove enable Drive offline system tray UI.

ash/ash_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains the strings for ash.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/ash_strings.h" type="rc_header">
@@ skipping 345 matching lines @@
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DISPLAY_ORIENTATION_90" desc="The value of display orientation option item: 90-degree rotated">
         90&#x00B0;
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DISPLAY_ORIENTATION_180" desc="The value of display orientation option item: 180-degree rotated">
         180&#x00B0;
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DISPLAY_ORIENTATION_270" desc="The value of display orientation option item: 270-degree rotated">
         270&#x00B0;
       </message>
-      <message name="IDS_ASH_STATUS_TRAY_DRIVE_OFFLINE_NOTICE" desc="The label in the tray notifying a first-time logged in user that they are being opted-in to Google Drive offline.">
-      Preparing Google Drive for offline... 
-      </message>
-      <message name="IDS_ASH_STATUS_TRAY_DRIVE_DISABLE_OFFLINE" desc="The label in the detailed drive offline opt-in notice tray item explaining how to disable Google Drive offline.">
-      To disable Google Drive offline on this device, adjust your settings at drive.google.com.
-      </message>
-      <message name="IDS_ASH_STATUS_TRAY_DRIVE_OFFLINE_FOOTER" desc="The label for the footer of the detailed drive offline opt-in notice tray item.">
-      Google Drive
-      </message>
       <message name="IDS_ASH_STATUS_TRAY_DRIVE_SYNCING" desc="The label in the tray to indicate onoing file sync operations.">
         Syncing <ph name="count">$1<ex>3</ex></ph> file(s)
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DRIVE" desc="The label used for Google Drive tray details header.">
         Google Drive
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DRIVE_SETTINGS" desc="The label used for Google Drive settings entry.">
         Google Drive settings...
       </message>
       <message name="IDS_ASH_STATUS_TRAY_IME" desc="The label used as the header in the IME popup.">
@@ skipping 211 matching lines @@
 
       <!-- ChromeOS-specific strings -->
       <if expr="pp_ifdef('chromeos')">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>