Revert "Caches the display names in MultiDisplayManager."

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 331 matching lines @@
       </message>
       <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_DISCOVERING" desc="The label used in the tray popup to show bluetooth is discovering devices.">
         Scanning for devices...
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING" desc="The label used in the tray to show that the current status is mirroring.">
         Mirroring to <ph name="DISPLAY_NAME">$1</ph>
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED" desc="The label used in the tray to show that the current status is extended.">
         Extending screen to <ph name="DISPLAY_NAME">$1</ph>
       </message>
-      <message name="IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME" desc="Label shown in tray for a display whose name is unknown.">
-        Unknown Display
-      </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 111 matching lines @@
       <message name="IDS_ASH_DISPLAY_FAILURE_ON_MIRRORING" desc="An error message to show that the system failed to enter the mirroring mode.">
         Can't duplicate image on attached monitors. No matching resolution found.
       </message>
       <message name="IDS_ASH_INTERNAL_DISPLAY_NAME" desc="The name of the internal display which is shown in the display settings.">
         Internal Display
       </message>
     </messages>
   </release>
 </grit>