Remove unnecessary condition from in flux difference function implementation
Remove unnecessary condition from in flux difference function implementation

mark-rushakoff/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,li-ang/influxdb,li-ang/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdata/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdata/influxdb,mark-rushakoff/influxdb