remove unused function
remove unused function

LacusCon/slua,luzexi/slua-3rd,jiangzhhhh/slua,Salada/slua,chiuan/slua,shrimpz/slua,yaukeywang/slua,soulgame/slua,soulgame/slua,angeldnd/slua,thing-nacho/slua,Roland0511/slua,chiuan/slua,mr-kelly/slua,LacusCon/slua,luzexi/slua-3rd-lib,DebugClub/slua,mr-kelly/slua,jiangzhhhh/slua,luzexi/slua-3rd-lib,DebugClub/slua,jiangzhhhh/slua,yaukeywang/slua,pangweiwei/slua,haolly/slua_source_note,haolly/slua_source_note,Roland0511/slua,haolly/slua_source_note,LacusCon/slua,luzexi/slua-3rd,LacusCon/slua,haolly/slua_source_note,luzexi/slua-3rd,shrimpz/slua,Roland0511/slua,luzexi/slua-3rd-lib,thing-nacho/slua,Roland0511/slua,jiangzhhhh/slua,LacusCon/slua,pangweiwei/slua,angeldnd/slua,yaukeywang/slua,Salada/slua,yaukeywang/slua,chiuan/slua,mr-kelly/slua,luzexi/slua-3rd,chiuan/slua,soulgame/slua,mr-kelly/slua,angeldnd/slua,luzexi/slua-3rd,Salada/slua,thing-nacho/slua,DebugClub/slua,Roland0511/slua,haolly/slua_source_note,angeldnd/slua,yaukeywang/slua,thing-nacho/slua,angeldnd/slua,DebugClub/slua,haolly/slua_source_note,soulgame/slua,pangweiwei/slua,angeldnd/slua,LacusCon/slua,thing-nacho/slua,yaukeywang/slua,pangweiwei/slua,jiangzhhhh/slua,Salada/slua,luzexi/slua-3rd,luzexi/slua-3rd-lib,soulgame/slua,pangweiwei/slua,chiuan/slua,Salada/slua,luzexi/slua-3rd-lib,luzexi/slua-3rd-lib,DebugClub/slua,jiangzhhhh/slua,mr-kelly/slua,Salada/slua,mr-kelly/slua,chiuan/slua,thing-nacho/slua,Roland0511/slua,soulgame/slua,DebugClub/slua