OOPS, remove local change that somehow slipped into a commit (I swear that

I already deleted it some time ago). This should fix problem people have with
unsefined reference to `MD_PRELOAD_COMPRESSED'.

Submitted by:	Manfred Antar <null@pozo.com>

sys/dev/md/md.c

@@ -811,7 +811,6 @@ mddetach(int unit, struct proc *p)
 	case MD_SWAP:
 	case MD_MALLOC:
 	case MD_PRELOAD:
-	case MD_PRELOAD_COMPRESSED:
 		return (mddestroy(sc, p));
 	default:
 		return (EOPNOTSUPP);