Remove the printf which announces the creation of malloc disks: it is

inconsistent when we do not do it for swap or vnode.

We still printf for preloaded disks because of the weak debugging
options people have in embedded/tiny environments where this is
usually used.

sys/dev/md/md.c

@@ -877,7 +877,6 @@ mdcreate_malloc(struct md_ioctl *mdio)
 		}
 	}
 	if (!error)  {
-		printf("%s%d: Malloc disk\n", MD_NAME, sc->unit);
 		mdinit(sc);
 	} else
 		mddestroy(sc, NULL);