Replace enzyme with testing-library/react

Enzyme is not compatible with react 17.

Change-Id: If9bca2c482bfe10a18d2ee2bc213dab966849b5b

src/setupTests.js

@@ -1,6 +1,3 @@
-import { configure } from "enzyme";
-import Adapter from "enzyme-adapter-react-16";
 import fetchMock from "jest-fetch-mock";
 
-configure({ adapter: new Adapter() });
 fetchMock.enableMocks();