Remove minified check

Fixes reduxjs#4443

Author: trajano

src/index.ts

@@ -4,7 +4,6 @@ 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'
 
 // types
@@ -38,26 +37,6 @@ export { MiddlewareAPI, Middleware } from './types/middleware'
 // actions
 export { Action, AnyAction } from './types/actions'
 
-/*
- * 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/configuration/mode/) ' +
-      'to ensure you have the correct code for your production build.'
-  )
-}
-
 export {
   createStore,
   combineReducers,