chore(*): Remove additional iteration.

Author: skrustev

projects/igniteui-angular/src/lib/data-operations/pivot-strategy.ts

@@ -59,7 +59,6 @@ export class PivotRowDimensionsStrategy implements IPivotDimensionStrategy {
                     PivotUtil.processSubGroups(row, prevRowDims.slice(0), siblingData, pivotKeys);
                     if (PivotUtil.getDimensionDepth(prevDim) > PivotUtil.getDimensionDepth(row) && siblingData.length > 1) {
                         newData[i][row.memberName + '_' + pivotKeys.records] = siblingData;
-                        i++;
                     } else {
                         newData.splice(i, 1, ...siblingData);
                         i += siblingData.length - 1;