Remove a bunch of stuff in //mojo

content/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
@@ skipping 446 matching lines @@
     "//gpu",
     "//ipc:test_support",
     "//media",
     "//media:test_support",
     "//media/audio:test_support",
     "//media/base:test_support",
     "//mojo/edk/system",
     "//mojo/edk/test:test_support",
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
-    "//mojo/test:test_support",
     "//net:test_support",
     "//services/shell/public/cpp",
     "//storage/browser",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/WebKit/public:blink",
     "//third_party/leveldatabase",
     "//third_party/mesa:osmesa",
     "//third_party/zlib",
     "//ui/accessibility",
@@ skipping 418 matching lines @@
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }