Remove 'bad_comment' experiemental code.

We can do that with commentd in future, if we really want.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@6024 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Giving money to artdsn & bugreport board is making trouble.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@6025 63ad8ddf-47c3-0310-b6dd-a9e9d9715204