gtk2 rbgtktreeviewcolumn.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtkdrag.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtktreerowreference.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtkstock.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtktreeview.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtktextiter.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtkfilechooser.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtkdialog.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgdkcursor.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgdkwindow.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtkmenubar.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgdkevent.c: drop GTK_CHECK_VERSION(2,8,0)
gtk2 rbgtkwindow.c: drop GTK_CHECK_VERSION(2,8,0)