test(simple-combo): Removing unnecessary code

Author: IvanKitanov17

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

@@ -45,7 +45,7 @@ const CSS_CLASS_INPUT_GROUP_INVALID = 'igx-input-group--invalid';
 const defaultDropdownItemHeight = 40;
 const defaultDropdownItemMaxHeight = 400;
 
-fdescribe('IgxSimpleCombo', () => {
+describe('IgxSimpleCombo', () => {
     let fixture: ComponentFixture<any>;
     let combo: IgxSimpleComboComponent;
     let input: DebugElement;