Remove AUTHORS section. This follows what is done in strstr.3

src/lib/libc/string/memmem.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: memmem.3,v 1.2 2013/07/16 15:21:11 schwarze Exp $
+.\"	$OpenBSD: memmem.3,v 1.3 2020/04/16 12:40:41 claudio Exp $
 .\"
 .\" Copyright (c) 2005 Pascal Gloor <pascal.gloor@spale.com>
 .\"
@@ -26,7 +26,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: July 16 2013 $
+.Dd $Mdocdate: April 16 2020 $
 .Dt MEMMEM 3
 .Os
 .Sh NAME
@@ -73,5 +73,3 @@ The
 .Fn memmem
 function first appeared in
 .Ox 5.4 .
-.Sh AUTHORS
-.An Pascal Gloor Aq Mt pascal.gloor@spale.com