[WebServer] Clean up UnregisterRequestEventHandler
[WebServer] Clean up UnregisterRequestEventHandler

murador/xsp,murador/xsp,arthot/xsp,stormleoxia/xsp,stormleoxia/xsp,arthot/xsp,murador/xsp,arthot/xsp,murador/xsp,stormleoxia/xsp,arthot/xsp,stormleoxia/xsp