[iOS] Use react native 0.62 hook for dark mode (#21455)

packages/compose/src/hooks/use-preferred-color-scheme/index.ios.js

@@ -1,18 +1,13 @@
 /**
  * External dependencies
  */
-import { useDarkModeContext, eventEmitter } from 'react-native-dark-mode';
-
-// Conditional needed to pass UI Tests on CI
-if ( eventEmitter.setMaxListeners ) {
-	eventEmitter.setMaxListeners( 150 );
-}
+import { useColorScheme } from 'react-native';
 
 /**
  * Returns the color scheme value when it changes. Possible values: [ 'light', 'dark' ]
  *
  * @return {string} return current color scheme.
  */
-const usePreferredColorScheme = useDarkModeContext;
+const usePreferredColorScheme = useColorScheme;
 
 export default usePreferredColorScheme;

test/native/setup.js

@@ -28,16 +28,6 @@ jest.mock( 'react-native-gutenberg-bridge', () => {
 	};
 } );
 
-jest.mock( 'react-native-dark-mode', () => {
-	return {
-		initialMode: 'light',
-		eventEmitter: {
-			on: jest.fn(),
-		},
-		useDarkModeContext: () => 'light',
-	};
-} );
-
 jest.mock( 'react-native-modal', () => () => 'Modal' );
 
 jest.mock( 'react-native-hr', () => () => 'Hr' );