####Background
We deployed GPay to production using a feature flag that limited its exposure to Japan: T363782. If all goes well with that exposure, and with Beta testing of GPay, we want to remove the feature flag in production and make GPay available to all.
NOTE: GPay will be released to everywhere in Beta as of the May 13-17 release cycle, but the Japan feature flag will be added for production. This task is to remove the feature flag.
####Requirements
- Remove feature flag that limits Native GPay to app users located in Japan, who are using English Wikipedia and Japanese Wikipedia
- GPay should be available to all languages and countries where available
- GPay should only appear in countries defined in the list: countryCodeGooglePayEnabled https://donate.wikimedia.org/wiki/MediaWiki:AppsDonationConfig.json