[loading window] Now the loading window has it's own thread. As such, the paint method is no longer needed.

src/arch/LoadingWindow/LoadingWindow.h

@@ -11,7 +11,6 @@ public:
 	virtual RString Init() { return RString(); }
 	virtual ~LoadingWindow() { }
 
-	virtual void Paint() { }
 	virtual void SetText( RString str ) = 0;
 	virtual void SetIcon( const RageSurface *pIcon ) { }
 	virtual void SetProgress( const int progress ) { m_progress=progress; }