Remove unremoved ".ie t" phrase in AUTHORS section.

Some Japanese manpages used ".ie t" phrase in AUTHORS section, until
jman command became to specify -mtty-char for groff invocation. When
jman became to specify -mtty-char around Jan 2001, I removed most of
such ".ie t" phrases. I realized that I forgot to update following
files and right now have revisited them.

Pointed out by: Satoru Koizumi <koizumi@cms.phys.s.u-tokyo.ac.jp>