remove legacy elasticsearch config from sample config
remove legacy elasticsearch config from sample config

raintank/raintank-metric,OOM-Killer/metrictank,replay/metrictank,raintank/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,raintank/raintank-metric,raintank/metrictank,OOM-Killer/metrictank,raintank/metrictank,OOM-Killer/metrictank,replay/metrictank,raintank/raintank-metric