Clean up discussion model
Clean up discussion model

flarum/core,flarum/core,malayladu/core,renyuneyun/core,dungphanxuan/core,dungphanxuan/core,malayladu/core,Albert221/core,falconchen/core,datitisev/core,kirkbushell/core,Onyx47/core,datitisev/core,datitisev/core,Albert221/core,jubianchi/core,flarum/core,Luceos/core,Luceos/core,zaksoup/core,jubianchi/core,kidaa/core,billmn/core,liukaijv/core,zaksoup/core,Onyx47/core,dungphanxuan/core,vuthaihoc/core,utkarshx/core,falconchen/core,billmn/core,vuthaihoc/core,kidaa/core,liukaijv/core,Albert221/core,malayladu/core,kirkbushell/core,kirkbushell/core,datitisev/core,malayladu/core,vuthaihoc/core,billmn/core,kirkbushell/core,huytd/core,renyuneyun/core,Onyx47/core,utkarshx/core,renyuneyun/core,Albert221/core,renyuneyun/core,falconchen/core,Luceos/core,zaksoup/core,huytd/core,Luceos/core,kidaa/core