Revert of Add deduplication logic to .pak files

ui/base/resource/data_pack_literal.h

Index: ui/base/resource/data_pack_literal.h
diff --git a/ui/base/resource/data_pack_literal.h b/ui/base/resource/data_pack_literal.h
deleted file mode 100644
index 0e74647771d0354a516f56c3cdef07cdabe4df40..0000000000000000000000000000000000000000
--- a/ui/base/resource/data_pack_literal.h
+++ /dev/null
@@ -1,23 +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.
-
-#ifndef UI_BASE_RESOURCE_DATA_PACK_LITERAL_H_
-#define UI_BASE_RESOURCE_DATA_PACK_LITERAL_H_
-
-namespace ui {
-
-extern const char kSamplePakContentsV4[];
-extern const size_t kSamplePakSizeV4;
-extern const char kSamplePakContentsV5[];
-extern const size_t kSamplePakSizeV5;
-extern const char kSamplePakContents2x[];
-extern const size_t kSamplePakSize2x;
-extern const char kEmptyPakContents[];
-extern const size_t kEmptyPakSize;
-extern const char kSampleCorruptPakContents[];
-extern const size_t kSampleCorruptPakSize;
-
-}  // namespace ui
-
-#endif  // UI_BASE_RESOURCE_DATA_PACK_LITERAL_H_