diff --git a/.github/workflows/size.yaml b/.github/workflows/size.yaml
index d9aa4474dc..4a1a023f8a 100644
--- a/.github/workflows/size.yaml
+++ b/.github/workflows/size.yaml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v2-beta
         with:
           fetch-depth: 1
-      - uses: preactjs/compressed-size-action@v1
+      - uses: preactjs/compressed-size-action@v2
         with:
           repo-token: '${{ secrets.GITHUB_TOKEN }}'
           pattern: './{dist,es,lib}/*.{js,mjs}'
diff --git a/src/index.js b/src/index.js
index 141a84e1dd..d5991f3471 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,29 +3,8 @@ import combineReducers from './combineReducers'
 import bindActionCreators from './bindActionCreators'
 import applyMiddleware from './applyMiddleware'
 import compose from './compose'
-import warning from './utils/warning'
 import __DO_NOT_USE__ActionTypes from './utils/actionTypes'
 
-/*
- * This is a dummy function to check if the function name has been altered by minification.
- * If the function has been minified and NODE_ENV !== 'production', warn the user.
- */
-function isCrushed() {}
-
-if (
-  process.env.NODE_ENV !== 'production' &&
-  typeof isCrushed.name === 'string' &&
-  isCrushed.name !== 'isCrushed'
-) {
-  warning(
-    'You are currently using minified code outside of NODE_ENV === "production". ' +
-      'This means that you are running a slower development build of Redux. ' +
-      'You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify ' +
-      'or setting mode to production in webpack (https://webpack.js.org/concepts/mode/) ' +
-      'to ensure you have the correct code for your production build.'
-  )
-}
-
 export {
   createStore,
   legacy_createStore,