Removed the DSP LLE on separate thread option.

The DSP thread will be enabled if the game is an AX ucode game and if the host has more than two cores (not including hyperthreading).

Source/Core/Core/Core.cpp

@@ -348,6 +348,11 @@ void EmuThread()
 
 	OSD::AddMessage("Dolphin " + g_video_backend->GetName() + " Video Backend.", 5000);
 
+	if (cpu_info.HTT)
+		SConfig::GetInstance().m_LocalCoreStartupParameter.bDSPThread = cpu_info.num_cores > 4;
+	else
+		SConfig::GetInstance().m_LocalCoreStartupParameter.bDSPThread = cpu_info.num_cores > 2;
+
 	if (!DSP::GetDSPEmulator()->Initialize(core_parameter.bWii, core_parameter.bDSPThread))
 	{
 		HW::Shutdown();