Remove unnecessary dependencies on mojo/edk/system

chrome/browser/ui/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
@@ skipping 144 matching lines @@
       "//components/browsing_data_ui",
       "//components/bubble:bubble",
       "//components/crash/core/browser",
       "//components/net_log",
       "//components/page_load_metrics/browser",
       "//components/power",
       "//components/suggestions/proto",
       "//components/url_formatter",
       "//device/nfc",
       "//media",
-      "//mojo/edk/system",
       "//net:net_with_v8",
       "//net:stale_while_revalidate_experiment_domains",
       "//storage/browser",
       "//storage/common",
       "//third_party/WebKit/public:resources",
       "//third_party/adobe/flash:flapper_version_h",
       "//third_party/brotli",
       "//third_party/leveldatabase",
       "//third_party/libjingle",
       "//third_party/re2",
@@ skipping 520 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }