remove unused extern
remove unused extern

akdor1154/kwm,cHoco/kwm,koekeishiya/kwm,a-morales/kwm,akdor1154/kwm,koekeishiya/kwm,a-morales/kwm,cHoco/kwm,cHoco/kwm,akdor1154/kwm,koekeishiya/kwm,a-morales/kwm