Clean up OS X wx library handling a bit.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6403 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/AudioCommon/Src/SConscript

@@ -24,7 +24,6 @@ else:
 		files += [ 'PulseAudioStream.cpp' ]
 	if sys.platform == 'win32':
 		files += [ 'DSoundStream.cpp' ]
-	if sys.platform == 'win32':
 		files += [ 'XAudio2Stream.cpp' ]
 
 env.StaticLibrary(env['local_libs'] + 'audiocommon', files)