Delete unused spreadsort implementation.

webrtc/system_wrappers/include/sort.h

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// Generic unstable sorting routines.
-
-#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_SORT_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_SORT_H_
-
-#include "webrtc/common_types.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-enum Type {
-  TYPE_Word8,
-  TYPE_UWord8,
-  TYPE_Word16,
-  TYPE_UWord16,
-  TYPE_Word32,
-  TYPE_UWord32,
-  TYPE_Word64,
-  TYPE_UWord64,
-  TYPE_Float32,
-  TYPE_Float64
-};
-
-// Sorts intrinsic data types.
-//
-// data            [in/out] A pointer to an array of intrinsic type.
-//                 Upon return it will be sorted in ascending order.
-// num_of_elements The number of elements in the array.
-// data_type       Enum corresponding to the type of the array.
-//
-// returns 0 on success, -1 on failure.
-int32_t Sort(void* data, uint32_t num_of_elements, Type data_type);
-
-// Sorts arbitrary data types. This requires an array of intrinsically typed
-// key values which will be used to sort the data array. There must be a
-// one-to-one correspondence between data elements and key elements, with
-// corresponding elements sharing the same position in their respective
-// arrays.
-//
-// data            [in/out] A pointer to an array of arbitrary type.
-//                 Upon return it will be sorted in ascending order.
-// key             [in] A pointer to an array of keys used to sort the
-//                 data array.
-// num_of_elements The number of elements in the arrays.
-// size_of_element The size, in bytes, of the data array.
-// key_type        Enum corresponding to the type of the key array.
-//
-// returns 0 on success, -1 on failure.
-//
-int32_t KeySort(void* data, void* key, uint32_t num_of_elements,
-                uint32_t size_of_element, Type key_type);
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_SORT_H_