Reset maintainer for ports maintaned by jlaffaye@.

As per policy, based on timeouts on

• www/py-scgi: bug#244982
• textproc/discount: bug#244981
• devel/py-python-gflags: bug#244965
• lang/go: bug#244783, https://reviews.freebsd.org/D24122
• news/py-yenc: bug#239309
• irc/libircclient: bug#221567