Cleanup.

src/renderer_d3d11.cpp

@@ -680,7 +680,7 @@ namespace bgfx { namespace d3d11
 					uint32_t flags = 0
 						| D3D11_CREATE_DEVICE_SINGLETHREADED
 						| D3D11_CREATE_DEVICE_BGRA_SUPPORT
-						| D3D11_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS
+//						| D3D11_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS
 						| (BX_ENABLED(BGFX_CONFIG_DEBUG) ? D3D11_CREATE_DEVICE_DEBUG : 0)
 						;