remove message cache from RAM
remove message cache from RAM

A-lxe/Gravebot,gw2code/Glenna,A-lxe/Gravebot,A-lxe/Gravebot,etp12/Gravebot,stratsco/stratsbot,freevortex/teabot,freevortex/teabot,etp12/Gravebot,stratsco/stratsbot,Gravebot/Gravebot,gw2code/Glenna,PhunStyle/Gravebot,PhunStyle/Gravebot,etp12/Gravebot,Gravebot/Gravebot,Gravebot/Gravebot,gw2code/Glenna,PhunStyle/Gravebot