fix(combo): removed unnecessary code in combo.component.spec.ts

Author: Zneeky

projects/igniteui-angular/src/lib/combo/combo.component.spec.ts

@@ -3426,7 +3426,6 @@ describe('igxCombo', () => {
                     input.triggerEventHandler('focus', {});
                     fixture.detectChanges();
                     expect(ngModel.touched).toBeFalse();
-                    combo.searchInput.nativeElement.focus();
                     fixture.detectChanges();
                     const documentClickEvent = new MouseEvent('click', { bubbles: true });
                     document.body.dispatchEvent(documentClickEvent);