Revert of Allow users to add third-party VPNs from the settings page

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <message name="IDS_CHROMEBOOK" desc="The localized name for Chromebook.">
     Chromebook
   </message>
   <message name="IDS_CHROMEBOX" desc="The localized name for Chromebox">
@@ skipping 1869 matching lines @@
   <message name="IDS_OPTIONS_SETTINGS_SECTION_TITLE_ADD_CONNECTION" desc="Title for control to add a new network connection." >
     Add connection
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ADD_CONNECTION_WIFI" desc="Menu item for adding a new Wi-Fi connection" >
     Add Wi-Fi...
   </message>
   <message name="IDS_OPTIONS_SETTINGS_SECTION_TITLE_REMEMBERED_NETWORK" desc="Title for section in settings/internet for list of remembered (favirote) networks">
     Remembered networks
 
   </message>
-  <message name="IDS_OPTIONS_SETTINGS_ADD_VPN_TEMPLATE" desc="Template for constructing a menu item that will ask a given VPN provider to show its 'add network' dialog.">
-    Add <ph name="PROVIDER_NAME">$1<ex>OpenVPN</ex></ph>...
-  </message>
   <!-- Network state strings -->
   <message name="IDS_CHROMEOS_NETWORK_STATE_NOT_CONNECTED" desc="Displayed state for a network when not connected.">
     Not connected
   </message>
   <message name="IDS_CHROMEOS_NETWORK_STATE_CONNECTED" desc="Displayed state for a network when connected">
     Connected
   </message>
   <message name="IDS_CHROMEOS_NETWORK_STATE_CONNECTING" desc="Displayed state for a network when connecting">
     Not Connected
   </message>
@@ skipping 4207 matching lines @@
   <message name="IDS_OPTIONS_CAPTIVE_PORTAL_BYPASS_PROXY_LABEL" desc="Option in chrome://settings that allows Captive Portal authorization pages to ignore proxy settings.">
     Allow captive portal sign-in page to bypass proxy servers
   </message>
   <message name="IDS_FLAGS_ENABLE_FIREWALL_HOLE_PUNCHING_NAME" desc="Name of the option to enable punching holes in the Chrome OS firewall.">
     Enable firewall hole punching.
   </message>
   <message name="IDS_FLAGS_ENABLE_FIREWALL_HOLE_PUNCHING_DESCRIPTION" desc="Description of the option to enable punching holes in the Chrome OS firewall.">
     Enable punching holes in the Chrome OS firewall for Chrome Apps that open a TCP/IP server socket or UDP socket.
   </message>
 </grit-part>