All the whitelist does is allow for your specific project to continue to serve Java 7 App Engine Standard applications up until the shutdown date <https://cloud.google.com/appengine/docs/deprecations/java7?hl=en_US&_ga=2.69274832.-1343801539.1522694534#shutdown_timetable>. If you do not use Java 7 and are already migrated to use Java 8, than whitelisting does not affect you.
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