Removing deprecated environments from App Remoting build files.

remoting/remoting_options.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
 
     # Set this to run the jscompile checks after building the webapp.
     'run_jscompile%': 0,
@@ skipping 18 matching lines @@
       ],
     },
     'remoting_multi_process%': '<(remoting_multi_process)',
 
     'remoting_rdp_session%': 1,
 
     'branding_path': '../remoting/branding_<(branding)',
 
     # The ar_service_environment variable is used to define the target
     # environment for the app being built.
-    # The allowed values are dev, test, staging, prod, and prod-testing.
+    # The allowed values are dev and prod.
     'conditions': [
       ['buildtype == "Dev"', {
         'ar_service_environment%': 'dev',
       }, {  # buildtype != 'Dev'
         # Non-dev builds should default to 'prod'.
         'ar_service_environment%': 'prod',
       }],
     ],  # conditions
 
   },
 }