Revert "add d,q,f and J to CHANMODES default, to work a bit better with dancer and possibly others"

This is no longer relevant and most ircds now send a correct isupport
message.

This reverts commit b832f1f7b2c4a692786d5d52904a2bdf4d14354f.
Merge pull request #42 from dgl/no-dancer

Revert "add d,q,f and J to CHANMODES default, to work a bit better with ...