This port will be removed on 2020-12-31 if not fixed
(In reply to Steve Wills from comment #0) Python support is optional and off by default. I suppose it can be removed safely anytime.
A commit references this bug: Author: makc Date: Sat Sep 26 08:14:43 UTC 2020 New revision: 550134 URL: https://svnweb.freebsd.org/changeset/ports/550134 Log: devel/antlr: - Remove support for Python2 - Update MASTER_SITES PR: 249608 Changes: head/devel/antlr/Makefile head/devel/antlr/pkg-plist