Common: Get rid of StdConditionVariable, StdMutex, and StdThread.

All of the compilers we support have support for these now.

Source/Core/AudioCommon/AOSoundStream.h

@@ -4,10 +4,11 @@
 
 #pragma once
 
+#include <mutex>
+#include <thread>
+
 #include "AudioCommon/SoundStream.h"
 #include "Common/Event.h"
-#include "Common/StdMutex.h"
-#include "Common/StdThread.h"
 
 #if defined(HAVE_AO) && HAVE_AO
 #include <ao/ao.h>

Source/Core/AudioCommon/DSoundStream.cpp

@@ -3,11 +3,11 @@
 // Refer to the license.txt file included.
 
 #include <cmath>
+#include <thread>
 #include <Windows.h>
 
 #include "AudioCommon/AudioCommon.h"
 #include "AudioCommon/DSoundStream.h"
-#include "Common/StdThread.h"
 #include "Common/Thread.h"
 
 bool DSound::CreateBuffer()

Source/Core/AudioCommon/DSoundStream.h

@@ -4,9 +4,10 @@
 
 #pragma once
 
+#include <thread>
+
 #include "AudioCommon/SoundStream.h"
 #include "Common/Event.h"
-#include "Common/StdThread.h"
 
 #ifdef _WIN32
 #include <Windows.h>

Source/Core/AudioCommon/Mixer.h

@@ -4,10 +4,10 @@
 
 #pragma once
 
+#include <mutex>
 #include <string>
 
 #include "AudioCommon/WaveFile.h"
-#include "Common/StdMutex.h"
 
 // 16 bit Stereo
 #define MAX_SAMPLES     (1024 * 2) // 64ms

Source/Core/AudioCommon/OpenALStream.cpp

@@ -2,10 +2,11 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
+#include <thread>
+
 #include "AudioCommon/aldlist.h"
 #include "AudioCommon/DPL2Decoder.h"
 #include "AudioCommon/OpenALStream.h"
-#include "Common/StdThread.h"
 #include "Common/Thread.h"
 
 #if defined HAVE_OPENAL && HAVE_OPENAL

Source/Core/AudioCommon/OpenALStream.h

@@ -4,9 +4,10 @@
 
 #pragma once
 
+#include <thread>
+
 #include "AudioCommon/SoundStream.h"
 #include "Common/Event.h"
-#include "Common/StdThread.h"
 #include "Core/Core.h"
 #include "Core/HW/AudioInterface.h"
 #include "Core/HW/SystemTimers.h"

Source/Core/AudioCommon/OpenSLESStream.h

@@ -4,9 +4,10 @@
 
 #pragma once
 
+#include <thread>
+
 #include "AudioCommon/SoundStream.h"
 #include "Common/Event.h"
-#include "Common/StdThread.h"
 
 class OpenSLESStream final : public SoundStream
 {