Remove pre-3.0 bitlbee scripts. 1.x is obsolete.

Bitlbee 1.x is unsupported and has at least two broken protocol modules. Nobody should be using it.

(Although after a few months of lurking #bitlbee i did find one or two people who had the old version, and their problems were solved with "update to 3.x")

But IMO it's better to remove this