move InputDrivers into RageInput

stepmania/src/PrefsManager.cpp

@@ -298,7 +298,6 @@ PrefsManager::PrefsManager() :
 	m_iSoundWriteAhead				( "SoundWriteAhead",			0 ),
 	m_iSoundDevice					( "SoundDevice",				"" ),
 	m_iSoundPreferredSampleRate		( "SoundPreferredSampleRate",	44100 ),
-	m_sInputDrivers					( "InputDrivers",				"" ),
 	m_sLightsStepsDifficulty		( "LightsStepsDifficulty",		"medium" ),
 	m_bBlinkGameplayButtonLightsOnNote	( "BlinkGameplayButtonLightsOnNote",false ),
 	m_bAllowUnacceleratedRenderer	( "AllowUnacceleratedRenderer",	false ),
@@ -514,13 +513,6 @@ float PrefsManager::GetSoundVolume()
 	return clamp(m_fSoundVolume.Get(),0.0f,1.0f);
 }
 
-CString PrefsManager::GetInputDrivers()	{
-	if( m_sInputDrivers.Get().empty() )
-		return (CString)DEFAULT_INPUT_DRIVER_LIST;
-	else
-		return m_sInputDrivers;
-}
-
 bool PrefsManager::MessageIsIgnored( const CString &ID )
 {
 	vector<CString> list;