Revert of Upstream Chrome on iOS source code [11/11].

ios/chrome/browser/ui/promos/BUILD.gn

Index: ios/chrome/browser/ui/promos/BUILD.gn
diff --git a/ios/chrome/browser/ui/promos/BUILD.gn b/ios/chrome/browser/ui/promos/BUILD.gn
deleted file mode 100644
index 655326c2ee0b88c387a25e2e497ccfdc36a79bc6..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/promos/BUILD.gn
+++ /dev/null
@@ -1,49 +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("promos") {
-  sources = [
-    "promo_view_controller.h",
-    "signin_promo_view_controller.h",
-    "signin_promo_view_controller.mm",
-  ]
-  deps = [
-    "//base",
-    "//components/signin/core/browser",
-    "//components/version_info",
-    "//ios/chrome/app:tests_hook",
-    "//ios/chrome/app/strings",
-    "//ios/chrome/browser/browser_state",
-    "//ios/chrome/browser/signin",
-    "//ios/chrome/browser/ui/authentication",
-    "//ios/chrome/browser/ui/commands",
-    "//ios/public/provider/chrome/browser",
-    "//ios/public/provider/chrome/browser/signin",
-    "//net",
-  ]
-  libs = [ "UIKit.framework" ]
-}
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "signin_promo_view_controller_unittest.mm",
-  ]
-  deps = [
-    ":promos",
-    "//base",
-    "//components/pref_registry",
-    "//components/sync_preferences",
-    "//components/sync_preferences:test_support",
-    "//ios/chrome/browser/browser_state:test_support",
-    "//ios/chrome/browser/prefs:browser_prefs",
-    "//ios/chrome/browser/signin",
-    "//ios/chrome/browser/signin:test_support",
-    "//ios/chrome/test:test_support",
-    "//ios/public/provider/chrome/browser/signin:test_support",
-    "//ios/web:test_support",
-    "//testing/gtest",
-    "//third_party/ocmock",
-  ]
-}