[mojo] Delete third_party/mojo

mojo/public/tools/bindings/bindings.gyp

 # Copyright 2016 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.
 
 {
   'includes': [
-    '../../../../third_party/mojo/mojom_bindings_generator_variables.gypi',
+    '../../../mojom_bindings_generator_variables.gypi',
   ],
   'targets': [
     {
       'target_name': 'precompile_mojom_bindings_generator_templates',
       'type': 'none',
       'actions': [
         {
           'action_name': 'precompile_mojom_bindings_generator_templates',
           'inputs': [
             '<@(mojom_bindings_generator_sources)',
@@ skipping 42 matching lines @@
             'python', '<@(mojom_bindings_generator)',
             '--use_bundled_pylibs', 'precompile',
             '-o', '<(SHARED_INTERMEDIATE_DIR)/mojo/public/tools/bindings',
           ],
         }
       ],
     },
   ],
 }