cleanup: outdated SCCS lines

Pat noted that I neglected to drop the SCCS lines on the files I've been
committing, so clean up those and any others I could find where the SCCS
line date is out of date.

include/botl.h

@@ -1,5 +1,4 @@
 /* NetHack 3.5	botl.h	$Date$  $Revision$ */
-/*	SCCS Id: @(#)botl.h 3.5	$Date$	*/
 /* Copyright (c) Michael Allison, 2003				  */
 /* NetHack may be freely redistributed.  See license for details. */