diff --git a/scripts/rollup/shims/facebook-www/ReactInstanceMap_DO_NOT_USE.js b/scripts/rollup/shims/facebook-www/ReactInstanceMap_DO_NOT_USE.js
deleted file mode 100644
index 1aa0186473..0000000000
--- a/scripts/rollup/shims/facebook-www/ReactInstanceMap_DO_NOT_USE.js
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-'use strict';
-
-const {
-  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED,
-} = require('ReactDOM');
-
-module.exports =
-  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.ReactInstanceMap;