Hotfix for Jest preset changes in 0a3c555 (#36495)

Summary:
Pull Request resolved: #36495

It looks like Jest is not running `babel/transform-modules-commonjs` on all files, and therefore when including `"import"` as a Package Exports condition in Jest, this misbehaved (0a3c555).

This is a hotfix to restore CI stability.

Changelog:
[Fix][Internal] Hotfix adjusting Jest changes added in 0a3c555

Reviewed By: cipolleschi, hoxyq

Differential Revision: D44130442

fbshipit-source-id: 6407519d0d5459ef422afe21be26a2e3141bedf3

jest/react-native-env.js

@@ -12,5 +12,5 @@
 const NodeEnv = require('jest-environment-node').TestEnvironment;
 
 module.exports = class ReactNativeEnv extends NodeEnv {
-  customExportConditions = ['import', 'require', 'react-native'];
+  customExportConditions = ['require', 'react-native'];
 };