Remove runtime alias hack (facebook#5142)

* Remove runtime alias hack

* Pass absolute path to preset

* Change comment

* Give a relative path to absolute runtime

* Clean up config

* Tweak again

* Make absolute runtime the default

* Remove runtime package from error overlay

config/webpack.config.dev.js

@@ -144,15 +144,6 @@ module.exports = {
     // for React Native Web.
     extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
     alias: {
-      // @remove-on-eject-begin
-      // Resolve Babel runtime relative to react-scripts.
-      // It usually still works on npm 3 without this but it would be
-      // unfortunate to rely on, as react-scripts could be symlinked,
-      // and thus @babel/runtime might not be resolvable from the source.
-      '@babel/runtime': path.dirname(
-        require.resolve('@babel/runtime/package.json')
-      ),
-      // @remove-on-eject-end
       // Support React Native Web
       // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
       'react-native': 'react-native-web',

config/webpack.config.prod.js

@@ -199,15 +199,6 @@ module.exports = {
     // for React Native Web.
     extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
     alias: {
-      // @remove-on-eject-begin
-      // Resolve Babel runtime relative to react-scripts.
-      // It usually still works on npm 3 without this but it would be
-      // unfortunate to rely on, as react-scripts could be symlinked,
-      // and thus @babel/runtime might not be resolvable from the source.
-      '@babel/runtime': path.dirname(
-        require.resolve('@babel/runtime/package.json')
-      ),
-      // @remove-on-eject-end
       // Support React Native Web
       // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
       'react-native': 'react-native-web',

package.json

@@ -22,7 +22,6 @@
   },
   "dependencies": {
     "@babel/core": "7.1.0",
-    "@babel/runtime": "7.0.0",
     "@svgr/webpack": "2.4.1",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "9.0.0",