SimpleFileLog: remove dead code
SimpleFileLog: remove dead code

dankenigsberg/logcabin,logcabin/logcabin,tempbottle/logcabin,chaozh/logcabin,TigerZhang/logcabin,gaoning777/logcabin,dankenigsberg/logcabin,dankenigsberg/logcabin,chaozh/logcabin,tempbottle/logcabin,gaoning777/logcabin,logcabin/logcabin,nhardt/logcabin,dankenigsberg/logcabin,logcabin/logcabin,tempbottle/logcabin,tempbottle/logcabin,logcabin/logcabin,TigerZhang/logcabin,chaozh/logcabin,gaoning777/logcabin,TigerZhang/logcabin,gaoning777/logcabin,nhardt/logcabin,chaozh/logcabin,TigerZhang/logcabin,nhardt/logcabin,nhardt/logcabin