[ios clean] Moves animator and presenters under transitions

ios/clean/chrome/browser/ui/animators/BUILD.gn

Index: ios/clean/chrome/browser/ui/animators/BUILD.gn
diff --git a/ios/clean/chrome/browser/ui/animators/BUILD.gn b/ios/clean/chrome/browser/ui/animators/BUILD.gn
deleted file mode 100644
index c563a9afe6f2612efa9de5c2051c3bb99b0d9b4d..0000000000000000000000000000000000000000
--- a/ios/clean/chrome/browser/ui/animators/BUILD.gn
+++ /dev/null
@@ -1,19 +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("animators") {
-  sources = [
-    "zoom_transition_animator.h",
-    "zoom_transition_animator.mm",
-    "zoom_transition_controller.h",
-    "zoom_transition_controller.mm",
-    "zoom_transition_delegate.h",
-  ]
-
-  configs += [ "//build/config/compiler:enable_arc" ]
-
-  deps = [
-    "//base",
-  ]
-}