Removed reference to non-existent dpkg(5) man page

dpkg-deb/dpkg-deb.1

@@ -232,7 +232,6 @@ package's scripts run and its status and contents recorded.
 .SH SEE ALSO
 .BR deb (5),
 .BR deb-control (5),
-.BR dpkg (5),
 .BR dpkg (8),
 .BR dselect (8).
 .SH AUTHOR