Delete unused spreadsort implementation.

webrtc/LICENSE_THIRD_PARTY

 This source tree contains third party source code which is governed by third
 party licenses. Paths to the files and associated licenses are collected here.
 
 Files governed by third party licenses:
 base/base64.cc
 base/base64.h
 base/md5.cc
 base/md5.h
 base/sha1.cc
 base/sha1.h
 base/sigslot.cc
 base/sigslot.h
 common_audio/fft4g.c
 common_audio/signal_processing/spl_sqrt_floor.c
 common_audio/signal_processing/spl_sqrt_floor_arm.S
 modules/audio_coding/codecs/g711/main/source/g711.c
 modules/audio_coding/codecs/g711/main/source/g711.h
 modules/audio_coding/codecs/g722/main/source/g722_decode.c
 modules/audio_coding/codecs/g722/main/source/g722_enc_dec.h
 modules/audio_coding/codecs/g722/main/source/g722_encode.c
 modules/audio_coding/codecs/isac/main/source/fft.c
 modules/audio_device/mac/portaudio/pa_memorybarrier.h
 modules/audio_device/mac/portaudio/pa_ringbuffer.c
 modules/audio_device/mac/portaudio/pa_ringbuffer.h
 modules/audio_processing/aec/aec_rdft.c
 system_wrappers/source/condition_variable_event_win.cc
 system_wrappers/source/set_thread_name_win.h
-system_wrappers/source/spreadsortlib/constants.hpp
-system_wrappers/source/spreadsortlib/spreadsort.hpp
 
 Individual licenses for each file:
 -------------------------------------------------------------------------------
 Files:
 base/base64.cc
 base/base64.h
 
 License:
 //*********************************************************************
 //* Base64 - a simple base64 encoder and decoder.
@@ skipping 410 matching lines @@
 (E) The software is licensed “as-is.” You bear the risk of using it. The
 contributors give no express warranties, guarantees or conditions. You may
 have additional consumer rights under your local laws which this license
 cannot change. To the extent permitted under your local laws, the contributors
 exclude the implied warranties of merchantability, fitness for a particular
 purpose and non-infringement.
 
 (F) Platform Limitation - The licenses granted in sections 2(A) and 2(B)
 extend only to the software or derivative works that you create that run on a
 Microsoft Windows operating system product.
--------------------------------------------------------------------------------
-Files:
-system_wrappers/source/spreadsortlib/constants.hpp
-system_wrappers/source/spreadsortlib/spreadsort.hpp
 
-License:
-/*Boost Software License - Version 1.0 - August 17th, 2003
-
-Permission is hereby granted, free of charge, to any person or organization
-obtaining a copy of the software and accompanying documentation covered by
-this license (the "Software") to use, reproduce, display, distribute,
-execute, and transmit the Software, and to prepare derivative works of the
-Software, and to permit third-parties to whom the Software is furnished to
-do so, all subject to the following:
-
-The copyright notices in the Software and this entire statement, including
-the above license grant, this restriction and the following disclaimer,
-must be included in all copies of the Software, in whole or in part, and
-all derivative works of the Software, unless such copies or derivative
-works are solely in the form of machine-executable object code generated by
-a source language processor.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-DEALINGS IN THE SOFTWARE.*/