Enable RL sync by default on iOS

components/reading_list/BUILD.gn

Index: components/reading_list/BUILD.gn
diff --git a/components/reading_list/BUILD.gn b/components/reading_list/BUILD.gn
deleted file mode 100644
index f13d6784304b655c4258e03db667ef5774adc49d..0000000000000000000000000000000000000000
--- a/components/reading_list/BUILD.gn
+++ /dev/null
@@ -1,62 +0,0 @@
-# Copyright 2016 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.
-
-source_set("reading_list") {
-  sources = [
-    "offline_url_utils.cc",
-    "offline_url_utils.h",
-    "reading_list_entry.cc",
-    "reading_list_entry.h",
-    "reading_list_model.cc",
-    "reading_list_model.h",
-    "reading_list_model_bridge_observer.h",
-    "reading_list_model_bridge_observer.mm",
-    "reading_list_model_impl.cc",
-    "reading_list_model_impl.h",
-    "reading_list_model_observer.h",
-    "reading_list_model_storage.h",
-    "reading_list_pref_names.cc",
-    "reading_list_pref_names.h",
-    "reading_list_store.cc",
-    "reading_list_store.h",
-    "reading_list_store_delegate.h",
-    "reading_list_switches.cc",
-    "reading_list_switches.h",
-  ]
-  deps = [
-    "//base",
-    "//components/keyed_service/core",
-    "//components/keyed_service/ios",
-    "//components/pref_registry",
-    "//components/prefs",
-    "//components/sync",
-    "//components/sync/protocol",
-    "//ios/web",
-    "//net",
-    "//url",
-  ]
-  public_deps = [
-    "//components/reading_list/proto",
-  ]
-}
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "offline_url_utils_unittest.cc",
-    "reading_list_entry_unittest.cc",
-    "reading_list_model_unittest.cc",
-    "reading_list_store_unittest.cc",
-  ]
-  deps = [
-    ":reading_list",
-    "//base",
-    "//base/test:test_support",
-    "//components/sync:test_support_model",
-    "//components/sync/protocol",
-    "//ios/web:test_support",
-    "//testing/gtest",
-    "//url",
-  ]
-}