Pass useBuiltIns directly to react-preset

Author: existentialism

Diff for: packages/babel-preset-react-app/index.js

@@ -76,6 +76,9 @@ module.exports = function(api, opts) {
           // Adds component stack to warning messages
           // Adds __self attribute to JSX which React will use for some warnings
           development: isEnvDevelopment || isEnvTest,
+          // Will use the native built-in instead of trying to polyfill
+          // behavior for any plugins that require one.
+          useBuiltIns: true,
         },
       ],
       isFlowEnabled && [require('@babel/preset-flow').default],
@@ -99,13 +102,6 @@ module.exports = function(api, opts) {
           useBuiltIns: true,
         },
       ],
-      // Transforms JSX
-      [
-        require('@babel/plugin-transform-react-jsx').default,
-        {
-          useBuiltIns: true,
-        },
-      ],
       // Polyfills the runtime needed for async/await and generators
       [
         require('@babel/plugin-transform-runtime').default,

Diff for: packages/babel-preset-react-app/package.json

@@ -20,7 +20,6 @@
     "@babel/plugin-transform-destructuring": "7.0.0-beta.42",
     "@babel/plugin-transform-react-constant-elements": "7.0.0-beta.42",
     "@babel/plugin-transform-react-display-name": "7.0.0-beta.42",
-    "@babel/plugin-transform-react-jsx": "7.0.0-beta.42",
     "@babel/plugin-transform-regenerator": "7.0.0-beta.42",
     "@babel/plugin-transform-runtime": "7.0.0-beta.42",
     "@babel/preset-env": "7.0.0-beta.42",