gtk2 rbgtktoggleaction.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgtkwidget.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgtkcelllayout.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgtkcalender.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgtkcombobox.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgtktextbuffer.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgdkcursor.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgdkwindow.c: drop GTK_CHECK_VERSION(2,4,0)
gtk2 rbgtkcolorbutton.c: drop GTK_CHECK_VERSION(2,4,0)