Fixed broken snapshot tests. Removed unused imports.

Author: yusinto

src/asyncWithLDProvider.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect, FunctionComponent, PropsWithChildren, ReactNode } from 'react';
+import React, { useState, useEffect, ReactNode } from 'react';
 import { LDFlagSet, LDFlagChangeset } from 'launchdarkly-js-client-sdk';
 import { AsyncProviderConfig, defaultReactOptions } from './types';
 import { Provider } from './context';

src/provider.test.tsx

@@ -39,7 +39,7 @@ describe('LDProvider', () => {
         <App />
       </LDProvider>
     );
-    const component = create(LaunchDarklyApp).toTree()?.instance as Component;
+    const component = create(LaunchDarklyApp);
     expect(component).toMatchSnapshot();
   });