mail/isync: Remove Oracle Berkeley DB 5.3 support

Remove support in preparation for removal of databases/db5

PR:		279146
Reviewed by:	ehaupt (maintainer)

mail/isync/Makefile

@@ -13,20 +13,18 @@ LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libsasl2.so:security/cyrus-sasl2
 
-USES=		alias bdb compiler:c11 cpe perl5 ssl
+USES=		alias compiler:c11 cpe perl5 ssl
 CPE_VENDOR=	isync_project
 USE_PERL5=	build
 
 GNU_CONFIGURE=	yes
 
+CONFIGURE_ENV+=	ac_cv_berkdb4=no
 CONFIGURE_ARGS=	--with-sasl=${LOCALBASE} \
 		--with-ssl=${OPENSSLLIB:H}
 
 MAKE_ARGS+=	SSL_LIBS="-L${OPENSSLLIB} -lssl -lcrypto"
 
-CPPFLAGS+=	-I${BDB_INCLUDE_DIR}
-LDFLAGS+=	-L${BDB_LIB_DIR}
-
 post-patch:
 	@${REINPLACE_CMD} -e 's|: install-docDATA|:|g' ${WRKSRC}/Makefile.in
 	@${REINPLACE_CMD} -e 's|\$$(docdir)/examples|\$$(sysconfdir)|g' \