Remove the Widevine signature files from the Linux and ChromeOS builds

chrome/installer/linux/BUILD.gn

 # Copyright 2015 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/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/sysroot.gni")
 import("//build/util/process_version.gni")
 import("//build/util/version.gni")
@@ skipping 176 matching lines @@
       "//components/nacl/loader:nacl_helper",
 
       # These are data_deps of nacl_helper, but that is not enough,
       # as explained above.
       "//native_client/src/trusted/service_runtime/linux:bootstrap",
       "//ppapi/native_client:irt",
     ]
   }
   if (current_cpu == "x86" || current_cpu == "x64") {
     public_deps += [
-      "//third_party/widevine/cdm:widevine_signature_scripts",
       "//third_party/widevine/cdm:widevinecdm",
       "//third_party/widevine/cdm:widevinecdmadapter",
     ]
   }
   if (!is_chromeos) {
     public_deps += [ ":rpm_packaging_files" ]
   }
   if (use_custom_libcxx) {
     public_deps += [ "//buildtools/third_party/libc++" ]
   }
@@ skipping 153 matching lines @@
 # Other packages that we support that aren't included in the default "linux"
 # target.
 linux_package("trunk") {
   channel = "trunk"
 }
 if (is_asan) {
   linux_package("asan") {
     channel = "asan"
   }
 }