Move responder tests and remove dead code

packages/legacy-events/__tests__/ResponderEventPlugin-test.internal.js → packages/react-native-renderer/src/__tests__/ResponderEventPlugin-test.internal.js

@@ -9,6 +9,9 @@
 
 'use strict';
 
+// This test is a hot mess. It heavily uses internals and relies on DOM even
+// though the responder plugin is only used in React Native. Sadness ensues.
+// The coverage is valuable though, so we will keep it for now.
 const {HostComponent} = require('react-reconciler/src/ReactWorkTags');
 const {PLUGIN_EVENT_SYSTEM} = require('react-dom/src/events/EventSystemFlags');
 
@@ -1379,7 +1382,7 @@ describe('ResponderEventPlugin', () => {
     const ReactTestUtils = require('react-dom/test-utils');
     const getLowestCommonAncestor = require('legacy-events/ResponderEventPlugin')
       .getLowestCommonAncestor;
-    const ReactDOMComponentTree = require('../../react-dom/src/client/ReactDOMComponentTree');
+    const ReactDOMComponentTree = require('react-dom/src/client/ReactDOMComponentTree');
 
     class ChildComponent extends React.Component {
       render() {

scripts/rollup/forks.js

@@ -481,14 +481,6 @@ const forks = Object.freeze({
         return null;
     }
   },
-
-  // React DOM uses different top level event names and supports mouse events.
-  'legacy-events/ResponderTopLevelEventTypes': (bundleType, entry) => {
-    if (entry === 'react-dom' || entry.startsWith('react-dom/')) {
-      return 'legacy-events/forks/ResponderTopLevelEventTypes.dom.js';
-    }
-    return null;
-  },
 });
 
 module.exports = forks;