fix(AdvancedFiltering): Removed old tests

Author: MarielaTihova

projects/igniteui-angular/src/lib/grids/grid/grid-filtering-advanced.spec.ts

@@ -119,26 +119,6 @@ describe('IgxGrid - Advanced Filtering #grid - ', () => {
             expect(GridFunctions.getAdvancedFilteringComponent(fix)).toBeNull();
         }));
 
-        it('Should set initial Advanced Filtering', fakeAsync(() => {
-            // Set filtering expressions tree
-            const tree = new FilteringExpressionsTree(FilteringLogic.And);
-            tree.filteringOperands.push({
-                fieldName: 'ProductName',
-                condition: IgxStringFilteringOperand.instance().condition('contains'),
-                searchVal: 'angular',
-                ignoreCase: true
-            });
-
-            // Add filters to the grid
-            const advancedFilteringTree: FilteringExpressionsTree = tree;
-            grid.advancedFilteringExpressionsTree = advancedFilteringTree;
-            fix.detectChanges();
-
-            // Verify number of advanced filters is correct
-            const advancedFilters = grid.advancedFilteringExpressionsTree.filteringOperands;
-            expect(advancedFilters.length).toEqual(1);
-        }));
-
         it('Should close Advanced Filtering dialog through API by respecting \'applyChanges\' argument.', fakeAsync(() => {
             grid.openAdvancedFilteringDialog();
             fix.detectChanges();