Revert of Create vector icon resource directory specific to Chrome.

chrome/app/vector_icons/vector_icons.h.template

Index: chrome/app/vector_icons/vector_icons.h.template
diff --git a/chrome/app/vector_icons/vector_icons.h.template b/chrome/app/vector_icons/vector_icons.h.template
deleted file mode 100644
index 4bc81a728b75c46d05b344dadeff3663ee85b815..0000000000000000000000000000000000000000
--- a/chrome/app/vector_icons/vector_icons.h.template
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2017 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.
-
-// vector_icons.h.template is used to generate vector_icons.h. Edit the former
-// rather than the latter.
-
-#ifndef CHROME_APP_VECTOR_ICONS_VECTOR_ICONS_H_
-#define CHROME_APP_VECTOR_ICONS_VECTOR_ICONS_H_
-
-namespace gfx {
-struct VectorIcon;
-}
-
-#define VECTOR_ICON_TEMPLATE_H(icon_name) \
-extern const gfx::VectorIcon icon_name;
-
-TEMPLATE_PLACEHOLDER
-
-#endif  // CHROME_APP_VECTOR_ICONS_VECTOR_ICONS_H_