Remove babel preset env

babel.config.js

@@ -2,8 +2,7 @@ module.exports = function (api) {
   api && api.cache(false);
   return {
     presets: [
-      'module:metro-react-native-babel-preset',
-      '@babel/preset-env'
+      'module:metro-react-native-babel-preset'
     ],
     plugins: [
       '@babel/plugin-proposal-export-namespace-from',

package.json

@@ -41,7 +41,6 @@
     "@types/react-test-renderer": "16.x.x",
     "@babel/plugin-proposal-export-default-from": "7.2.0",
     "@babel/plugin-proposal-export-namespace-from": "7.2.0",
-    "@babel/preset-env": "7.5.0",
     "typescript": "3.2.2",
     "babel-eslint": "9.0.0",
     "chai": "^3.5.0",