Makefile.PL: drop update-copyrights rule

I'm no longer updating them since it's noisy and acceptable
to not have them:

  https://www.linuxfoundation.org/blog/copyright-notices-in-open-source-software-projects/

I'm tired of being reminded what year it is :<

diff --git a/Makefile.PL b/Makefile.PL
index 9233ac9d12b45562a7131c4f77d9a473de628146..8de1351f99bc3ca3b8bb1c38907b2acdaea65336 100644 (file)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -261,11 +261,5 @@ symlink-install : lib/PublicInbox.pm
 pure_all :: lib/PublicInbox.pm
 lib/PublicInbox.pm : FORCE
        VERSION=\$(VERSION) \$(PERL) -w ./version-gen.perl
-
-update-copyrights :
-       \@case '\$(GNULIB_PATH)' in '') echo >&2 GNULIB_PATH unset; false;; esac
-       git ls-files | UPDATE_COPYRIGHT_HOLDER='all contributors' \\
-               UPDATE_COPYRIGHT_USE_INTERVALS=2 \\
-               xargs \$(GNULIB_PATH)/build-aux/update-copyright
 EOF
 }