games/ldmud: Remove non default option MYSQL

- When enabled with MYSQL option this port is BROKEN on all available
  versions of mysql in the tree.

games/ldmud/Makefile

@@ -33,7 +33,7 @@ WRKSRC=		${WRKDIR}/${PORTNAME}-${PORTVERSION}/src
 USERS=		mud
 GROUPS=		mud
 
-OPTIONS_DEFINE=	MYSQL PGSQL SQLITE IPV6 DOCS
+OPTIONS_DEFINE=	PGSQL SQLITE IPV6 DOCS
 OPTIONS_DEFAULT=PGSQL SQLITE LPMUD
 OPTIONS_SINGLE=	MUDLIB
 OPTIONS_SINGLE_MUDLIB=	LPMUD DEMOLIB
@@ -42,10 +42,6 @@ OPTIONS_SUB=	yes
 LPMUD_DESC=	Install default mudlib (LP-245)
 
 IPV6_CONFIGURE_ENABLE=	use-ipv6
-MYSQL_USES=		mysql
-MYSQL_CONFIGURE_ENABLE=	use-mysql
-MYSQL_LDFLAGS=	-L${LOCALBASE}/lib/mysql
-MYSQL_VARS=		IGNORE_WITH_MYSQL="105m 106m 1011m 80 81"
 PGSQL_USES=		pgsql
 PGSQL_CONFIGURE_ENABLE=	use-pgsql
 SQLITE_USES=		sqlite