Remove forum from README
Remove forum from README

Sadly I can't maintain a forum anymore, users should use otland

dreamsxin/otclient,EvilHero90/otclient,Radseq/otclient,EvilHero90/otclient,gpedro/otclient,dreamsxin/otclient,Radseq/otclient,Cavitt/otclient_mapgen,gpedro/otclient,kwketh/otclient,Cavitt/otclient_mapgen,kwketh/otclient,dreamsxin/otclient,gpedro/otclient