MINOR: Remove redundant initialization of `Stats.index`
@@ -315,7 +315,6 @@ public class ProducerPerformance {
public Stats(long numRecords, int reportingInterval) {
this.start = System.currentTimeMillis();
this.windowStart = System.currentTimeMillis();
- this.index = 0;
this.iteration = 0;
this.sampling = (int) (numRecords / Math.min(numRecords, 500000));
this.latencies = new int[(int) (numRecords / this.sampling) + 1];
