removed debugging wxPrintf() which not only had nothing to do there but also broke PCH-less compilation

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58376 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/listctrl.cpp

@@ -4924,10 +4924,6 @@ void wxListMainWindow::SortItems( wxListCtrlCompare fn, long data )
 
 void wxListMainWindow::OnScroll(wxScrollWinEvent& event)
 {
-    wxPrintf( "wxListMainWindow::OnScroll\n" );
-
-    // HandleOnScroll( event );
-
     // update our idea of which lines are shown when we redraw the window the
     // next time
     ResetVisibleLinesRange();