Remove unnecessary dependencies on mojo/edk/system

device/usb/BUILD.gn

 # Copyright (c) 2013 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/features.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
 assert(!is_ios)
 
 if (is_android) {
@@ skipping 149 matching lines @@
 }
 
 fuzzer_test("usb_descriptors_fuzzer") {
   sources = [
     "usb_descriptors_fuzzer.cc",
   ]
   deps = [
     ":usb",
     "//device/usb/mojo",
     "//device/usb/public/interfaces",
-    "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
   ]
   seed_corpus = "fuzz_corpus"
   libfuzzer_options = [ "max_len=2048" ]
 }
 
 fuzzer_test("usb_string_read_fuzzer") {
   sources = [
     "usb_string_read_fuzzer.cc",
   ]
@@ skipping 20 matching lines @@
     jni_package = "device"
   }
 
   android_library("java") {
     java_files = java_sources_needing_jni
     deps = [
       "//base:base_java",
     ]
   }
 }