Remove GetServerStats from Client.proto
Remove GetServerStats from Client.proto

This was no longer used and should have been removed earlier in
75cdaf7e.

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