"fix" B6004

The comment about Book of the Dead's taming effect working
on nearby monsters when read while swallowed was wrong.  It was
only put there in the first place to avoid adding extra code to
suppress taming while swallowed when that was done for the other
methods of taming.  Any need for extra code here turns out to be
unnecessary due to the cansee() check.

src/spell.c

@@ -241,7 +241,6 @@ raise_dead:
 	mm.y = u.uy;
 	mkundead(&mm, TRUE, NO_MINVENT);
     } else if(book2->blessed) {
-	/* the Book operates on nearby monsters even if you're swallowed */
 	for(mtmp = fmon; mtmp; mtmp = mtmp2) {
 	    mtmp2 = mtmp->nmon;		/* tamedog() changes chain */
 	    if (DEADMONSTER(mtmp)) continue;