Removes files from //build that we don't need

build/config/ios/BUILD.gn

Index: build/config/ios/BUILD.gn
diff --git a/build/config/ios/BUILD.gn b/build/config/ios/BUILD.gn
deleted file mode 100644
index 02923155891a23f28a270b262b601bf427e5c971..0000000000000000000000000000000000000000
--- a/build/config/ios/BUILD.gn
+++ /dev/null
@@ -1,15 +0,0 @@
-# Copyright 2014 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/sysroot.gni")
-import("//build/config/ios/ios_sdk.gni")
-
-config("sdk") {
-  common_flags = [
-    "-stdlib=libc++",
-  ]
-
-  cflags = common_flags
-  ldflags = common_flags
-}