Sorry, the not-so-short patch would be like this.
--- a/driver/demo-Gtk.c +++ b/driver/demo-Gtk.c @@ -5292,7 +5292,7 @@ main (int argc, char **argv) the_network_is_not_the_computer (s); - if (senescent_p()) + if (0) warning_dialog (s->toplevel_widget, _("Warning:\n\n" "This version of xscreensaver is VERY OLD!\n" --- a/driver/lock.c +++ b/driver/lock.c @@ -487,7 +487,7 @@ make_passwd_window (saver_info *si, * room for the dialog to grow without going off the edge of the screen. */ max_string_width_px *= 0.75; - if (!info_msg && senescent_p()) + if (0) info_msg = ("\n" "This version of XScreenSaver\n" "is very old! Please upgrade!\n"); --- a/driver/splash.c +++ b/driver/splash.c @@ -167,7 +167,7 @@ make_splash_dialog (saver_info *si) Colormap cmap; char *f; - Bool whine = senescent_p (); + Bool whine = 0; if (whine) { --- a/driver/xscreensaver.c +++ b/driver/xscreensaver.c @@ -784,7 +784,7 @@ print_banner (saver_info *si) "\n", blurb()); - if (p->verbose_p && senescent_p ()) + if (0) fprintf (stderr, "\n" "*************************************" "**************************************\n"