Kill off enzyme in preference of react testing library (#10255)

test/setupTests.js

@@ -15,14 +15,8 @@ limitations under the License.
 */
 
 import "@testing-library/jest-dom";
-import Adapter from "@wojtekmaj/enzyme-adapter-react-17";
-// eslint-disable-next-line deprecate/import
-import { configure } from "enzyme";
 import "blob-polyfill"; // https://github.com/jsdom/jsdom/issues/2555
 
-// Enable the enzyme mocks
-configure({ adapter: new Adapter() });
-
 // Very carefully enable the mocks for everything else in
 // a specific order. We use this order to ensure we properly
 // establish an application state that actually works.