Removed duplicate entry for SDL_wasapi.h

VisualC/SDL/SDL.vcxproj

@@ -291,7 +291,6 @@
     <ClInclude Include="..\..\src\audio\directsound\SDL_directsound.h" />
     <ClInclude Include="..\..\src\audio\disk\SDL_diskaudio.h" />
     <ClInclude Include="..\..\src\audio\dummy\SDL_dummyaudio.h" />
-    <ClInclude Include="..\..\src\audio\wasapi\SDL_wasapi.h" />
     <ClInclude Include="..\..\src\audio\SDL_audio_c.h" />
     <ClInclude Include="..\..\src\audio\SDL_audiodev_c.h" />
     <ClInclude Include="..\..\src\audio\SDL_sysaudio.h" />