kill dead .Xr to memory(3);

from kjell@

src/lib/libc/stdlib/malloc.3

@@ -30,7 +30,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: malloc.3,v 1.36 2004/02/09 13:07:42 espie Exp $
+.\"	$OpenBSD: malloc.3,v 1.37 2004/07/02 10:42:55 jmc Exp $
 .\"
 .Dd August 27, 1996
 .Dt MALLOC 3
@@ -399,8 +399,7 @@ We found something we didn't understand.
 .Sh SEE ALSO
 .Xr brk 2 ,
 .Xr alloca 3 ,
-.Xr getpagesize 3 ,
-.Xr memory 3
+.Xr getpagesize 3
 .Sh STANDARDS
 The
 .Fn malloc