Testing changes in playground doesn't work

[krzysdz]

When a PR to DefinitelyTyped is opened, the mergebot posts a comment You can test the changes of this PR in the Playground. When the link to playground is opened and user agrees to install the playground-dt-review plugin, the plugin makes a request to https://dtmergebot.azurewebsites.net/api/Playground-Info?number=${prNum}&code=<something>. This request fails, because dtmergebot.azurewebsites.net does not exist. There is a PR (orta/playground-dt-review#6) to change the URL to dtmergebot2, but it also doesn't exist.

According to the configuration, up-to-date domain is dtmergebot3.azurewebsites.net, but if I modify the plugin code and change the domain, server responds with 403 Ip Forbidden.

Could you either fix the API access (and somehow get @orta to update the plugin)? The alternative is removing entirely this broken functionality and the message from mergebot:

DefinitelyTyped-tools/packages/mergebot/src/compute-pr-actions.ts

Lines 603 to 605 in f986e04

	if (!info.tooManyFiles) {
	display(``, `You can test the changes of this PR [in the Playground](${urls.playground(info.pr_number)}).`);
	}

[jakebailey]

This service has been shut down, and the infra has been locked off to only be accessible by GitHub webhooks. We just need to remove the message from the bot text.