Remove per measurement stats collection
Remove per measurement stats collection

The stats setup ends up creating a lot of lock contention which signifcantly
impacts write throughput when a large number of measurements are used.

Fixes #6131

mnuessler/influxdb,otoolep/influxdb,jgeiger/influxdb,daachi/influxdb,jgeiger/influxdb,jgeiger/influxdb,jipperinbham/influxdb,otoolep/influxdb,vladlopes/influxdb,pkittenis/influxdb,vladlopes/influxdb,runner-mei/influxdb,influxdb/influxdb,li-ang/influxdb,benbjohnson/influxdb,influxdb/influxdb,jgeiger/influxdb,linearb/influxdb,arussellsaw/influxdb,jipperinbham/influxdb,archsaber/influxdb,mark-rushakoff/influxdb,daachi/influxdb,otoolep/influxdb,mnuessler/influxdb,otoolep/influxdb,runner-mei/influxdb,pkittenis/influxdb,apigee/influxdb,arussellsaw/influxdb,benbjohnson/influxdb,daachi/influxdb,mnuessler/influxdb,mark-rushakoff/influxdb,daachi/influxdb,linearb/influxdb,li-ang/influxdb,pkittenis/influxdb,mnuessler/influxdb,vladlopes/influxdb,chenziliang/influxdb,arussellsaw/influxdb,apigee/influxdb,jgeiger/influxdb,pkittenis/influxdb,influxdb/influxdb,jipperinbham/influxdb,jgeiger/influxdb,joaopedrotaveira/influxdb,daachi/influxdb,mvadu/influxdb,influxdb/influxdb,mnuessler/influxdb,influxdb/influxdb,otoolep/influxdb,benbjohnson/influxdb,joaopedrotaveira/influxdb,pkittenis/influxdb,jipperinbham/influxdb,daachi/influxdb,jipperinbham/influxdb,nooproblem/influxdb,influxdb/influxdb,mvadu/influxdb,mark-rushakoff/influxdb,mvadu/influxdb,archsaber/influxdb,benbjohnson/influxdb,mark-rushakoff/influxdb,joaopedrotaveira/influxdb,runner-mei/influxdb,apigee/influxdb,linearb/influxdb,nooproblem/influxdb,joaopedrotaveira/influxdb,jipperinbham/influxdb,nooproblem/influxdb,mvadu/influxdb,apigee/influxdb,arussellsaw/influxdb,chenziliang/influxdb,mvadu/influxdb,apigee/influxdb,linearb/influxdb,influxdata/influxdb,runner-mei/influxdb,influxdata/influxdb,vladlopes/influxdb,joaopedrotaveira/influxdb,chenziliang/influxdb,arussellsaw/influxdb,mnuessler/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,nooproblem/influxdb,archsaber/influxdb,linearb/influxdb,otoolep/influxdb,chenziliang/influxdb,mark-rushakoff/influxdb,mvadu/influxdb,apigee/influxdb,archsaber/influxdb,arussellsaw/influxdb,pkittenis/influxdb