Clean up after java/openjdk6 and java/openjdk6-jre removal

java/openjdk6 support was removed from Mk/bsd.java.mk (r512662) and
java/openjdk6 and java/openjdk6-jre were removed from the ports tree
(r512663).  Now this patch completely removes remaining stuff from the
ports tree.

PR:			241953 (exp-run)
Reviewed by:		glewis
Approved by:		portmgr (antoine)
Differential Revision:	https://reviews.freebsd.org/D22342

java/sqlitejdbc/Makefile

@@ -16,7 +16,6 @@ LIB_DEPENDS=	libsqlite3.so:databases/sqlite3
 
 WRKSRC=		${WRKDIR}/${PORTNAME}-${DISTVERSIONPREFIX}${DISTVERSION}
 USE_JAVA=	yes
-JAVA_VERSION=	1.6+
 USES=		gmake tar:tgz
 MAKE_ENV=	JAVA_HOME="${JAVA_HOME}"
 ALL_TARGET=	native