Remove obsolete strings file as they are not required.

ios/chrome/browser/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/features.gni")
 import("//build/config/ios/rules.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 declare_args() {
   google_test_gaia_client_id = ""
@@ skipping 56 matching lines @@
     "root_coordinator.mm",
     "storekit_launcher.h",
     "tab_parenting_global_observer.cc",
     "tab_parenting_global_observer.h",
     "web_data_service_factory.cc",
     "web_data_service_factory.h",
     "xcallback_parameters.h",
     "xcallback_parameters.mm",
   ]
   deps = [
+    ":settings_resources",
     "//base",
     "//components/autofill/core/browser",
     "//components/autofill/core/common",
     "//components/gcm_driver",
     "//components/handoff",
     "//components/keyed_service/core",
     "//components/keyed_service/ios",
     "//components/metrics",
     "//components/metrics_services_manager",
     "//components/net_log",
@@ skipping 133 matching lines @@
 }
 
 bundle_data("settings_resources") {
   sources = [
     "resources/Settings.bundle/Experimental.plist",
     "resources/Settings.bundle/Root.plist",
   ]
   outputs = [
     "{{bundle_resources_dir}}/Settings.bundle/{{source_file_part}}",
   ]
-  deps = [
-    ":settings_resources_experimental_strings",
-    ":settings_resources_root_strings",
-  ]
-}
-
-bundle_data_strings("settings_resources_experimental_strings") {
-  visibility = [ ":settings_resources" ]
-  source = "resources/Settings.bundle/en.lproj/Experimental.strings"
-  output =
-      "{{bundle_resources_dir}}/Settings.bundle/en.lproj/{{source_file_part}}"
-}
-
-bundle_data_strings("settings_resources_root_strings") {
-  visibility = [ ":settings_resources" ]
-  source = "resources/Settings.bundle/en.lproj/Root.strings"
-  output =
-      "{{bundle_resources_dir}}/Settings.bundle/en.lproj/{{source_file_part}}"
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "chrome_url_util_unittest.mm",
     "crash_loop_detection_util_unittest.mm",
     "install_time_util_unittest.mm",
     "installation_notifier_unittest.mm",
     "ios_chrome_io_thread_unittest.mm",
     "notification_promo_unittest.cc",
   ]
   deps = [
     ":browser",
     "//base",
     "//base/test:test_support",
     "//components/prefs",
     "//components/prefs:test_support",
     "//components/proxy_config",
     "//components/ssl_config",
     "//components/variations",
     "//ios/web:test_support",
     "//net",
     "//net:test_support",
     "//testing/gtest",
     "//url",
   ]
 }