Remove left over fieldName.

Author: MKirova

projects/igniteui-angular/src/lib/grids/pivot-grid/pivot-header-row.component.ts

@@ -53,15 +53,15 @@ export class IgxPivotHeaderRowComponent extends IgxGridHeaderRowComponent {
     public rowRemoved(event: IBaseChipEventArgs) {
         const row = this.grid.pivotConfiguration.rows.find(x => x.memberName === event.owner.id);
         row.enabled = false;
-        this.grid.filteringService.clearFilter(row.fieldName);
+        this.grid.filteringService.clearFilter(row.memberName);
         this.grid.pipeTrigger++;
     }
 
     public columnRemoved(event: IBaseChipEventArgs) {
         const col = this.grid.pivotConfiguration.columns.find(x => x.memberName === event.owner.id);
         col.enabled = false;
         this.grid.setupColumns();
-        this.grid.filteringService.clearFilter(col.fieldName);
+        this.grid.filteringService.clearFilter(col.memberName);
         this.grid.pipeTrigger++;
     }
 
@@ -75,7 +75,7 @@ export class IgxPivotHeaderRowComponent extends IgxGridHeaderRowComponent {
     public filterRemoved(event: IBaseChipEventArgs) {
         const filter = this.grid.pivotConfiguration.filters.find(x => x.memberName === event.owner.id);
         filter.enabled = false;
-        this.grid.filteringService.clearFilter(filter.fieldName);
+        this.grid.filteringService.clearFilter(filter.memberName);
         this.grid.pipeTrigger++;
     }