remove unnecessary method thisNode()
remove unnecessary method thisNode()

replay/metrictank,raintank/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,raintank/metrictank,raintank/metrictank,replay/metrictank,raintank/raintank-metric,raintank/raintank-metric,raintank/raintank-metric