diff --git a/packages/react-dom/src/client/ReactDOMFB.js b/packages/react-dom/src/client/ReactDOMFB.js
index 83353421e4ae0..a995f485578d8 100644
--- a/packages/react-dom/src/client/ReactDOMFB.js
+++ b/packages/react-dom/src/client/ReactDOMFB.js
@@ -7,9 +7,7 @@
  * @flow
  */
 
-import {findCurrentFiberUsingSlowPath} from 'react-reconciler/reflection';
 import {getIsHydrating} from 'react-reconciler/src/ReactFiberHydrationContext';
-import {get as getInstance} from 'shared/ReactInstanceMap';
 import {addUserTimingListener} from 'shared/ReactFeatureFlags';
 
 import ReactDOM from './ReactDOM';
@@ -23,15 +21,9 @@ Object.assign(
     ReactBrowserEventEmitter: {
       isEnabled,
     },
-    ReactFiberTreeReflection: {
-      findCurrentFiberUsingSlowPath,
-    },
     ReactDOMComponentTree: {
       getClosestInstanceFromNode,
     },
-    ReactInstanceMap: {
-      get: getInstance,
-    },
     // Perf experiment
     addUserTimingListener,