[UI Strings] Remove unused strings in ui/strings/ui_strings.grd

ui/strings/ui_strings.grd

Index: ui/strings/ui_strings.grd
diff --git a/ui/strings/ui_strings.grd b/ui/strings/ui_strings.grd
index 0cf9f04ff38647ea4578d8048c128682aab6d8f9..fbc7932019fe986406d528a0485f10b00176b813 100644
--- a/ui/strings/ui_strings.grd
+++ b/ui/strings/ui_strings.grd
@@ -478,9 +478,6 @@ need to be translated for each locale.-->
       <message name="IDS_APP_SPACE_KEY" desc="Space bar key">
         Space
       </message>
-      <message name="IDS_APP_ALT_KEY" desc="Alt key">
-        Alt
-      </message>
       <message name="IDS_APP_F1_KEY" desc="F1 key">
         F1
       </message>
@@ -580,11 +577,6 @@ need to be translated for each locale.-->
       <message name="IDS_MESSAGE_CENTER_SETTINGS_BUTTON_LABEL" desc="The button label for visiting the appropriate settings page in the footer of the message center.">
         Settings
       </message>
-      <if expr="is_macosx">
-        <message name="IDS_MESSAGE_CENTER_SETTINGS_GO_BACK_BUTTON_TOOLTIP" desc="The tooltip on back button that returns from settings to the notification list.">
-          Go back to notifications
-        </message>
-      </if>
       <message name="IDS_MESSAGE_CENTER_SETTINGS_DIALOG_DESCRIPTION" desc="The label to describe the settings dialog.">
         Allow notifications from the following:
       </message>
@@ -638,12 +630,6 @@ need to be translated for each locale.-->
       </if>
 
       <!-- App list -->
-      <message name="IDS_APP_LIST_HELP" desc="The menu entry to show the app list help UI.">
-        Help
-      </message>
-      <message name="IDS_APP_LIST_OPEN_FEEDBACK" desc="The menu entry to show the feedback UI.">
-        Send feedback
-      </message>
       <message name="IDS_APP_LIST_BACK" desc="The name of the button that goes to the previous screen in the launcher.">
         Back
       </message>