Remove all blimp engine code

tools/gritsettings/resource_ids

 # 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.
 #
 # This file is used to assign starting resource ids for resources and strings
 # used by Chromium.  This is done to ensure that resource ids are unique
 # across all the grd files.  If you are adding a new grd file, please add
 # a new entry to this file.
 #
 # The entries below are organized into sections. When adding new entries,
@@ skipping 235 matching lines @@
     "messages": [23510],
   },
 
   "ash/ash_strings.grd": {
     "messages": [23520],
   },
   "ash/resources/ash_resources.grd": {
     "structures": [23920],
   },
 
-  "blimp/client/support/resources/blimp_support_strings.grd": {
-    "messages": [24200],
-  },
-  "blimp/client/core/resources/blimp_strings.grd": {
-    "messages": [24210],
-  },
-  "blimp/engine/app/blimp_browser_resources.grd": {
-    "includes": [24250],
-  },
+  # //blimp used to have IDs from 24200-24299, which are now free to use.
 
   "chromecast/browser/cast_browser_resources.grd": {
     "includes": [24300],
   },
 
   "device/bluetooth/bluetooth_strings.grd": {
     "messages": [24400],
   },
 
   "extensions/browser/resources/extensions_browser_resources.grd": {
@@ skipping 83 matching lines @@
         "messages": [28650],
   },
   # END "everything else" section.
   # Everything but chrome/, components/, content/, and ios/
 
   # Thinking about appending to the end?
   # Please read the header and find the right section above instead.
 
   # Resource ids starting at 31000 are reserved for projects built on Chromium.
 }