Remove unused Mode_PlayTrack and m_trackToPlay

src/core/Song.cpp

@@ -94,7 +94,6 @@ Song::Song() :
 	m_errors( new QList<QString>() ),
 	m_playMode( Mode_None ),
 	m_length( 0 ),
-	m_trackToPlay( NULL ),
 	m_patternToPlay( NULL ),
 	m_loopPattern( false ),
 	m_elapsedMilliSeconds( 0 ),
@@ -221,10 +220,6 @@ void Song::processNextBuffer()
 			}
 			break;
 
-		case Mode_PlayTrack:
-			trackList.push_back( m_trackToPlay );
-			break;
-
 		case Mode_PlayBB:
 			if( Engine::getBBTrackContainer()->numOfBBs() > 0 )
 			{