Remove /stable/ from api doc urls

[MaryaBelanger]

Fixes #6210

I did a find-and-replace to remove the redirects to /stable/ ({{site.sdkInfo.channel}}), based on this note from the new api backend launch comms:

• api.dart.dev/ serves the latest stable directly (no longer redirects to /stable/).
• api.dart.dev/(main|dev|beta) redirects to api.dart.dev/(main|dev|beta)/latest.

But I didn't account for the second bullet, any possible main/dev/beta redirects, will that be an issue?

I also came across this note that uses site.sdkInfo.channel as a condition...So I'm starting to think that blanket-removing all of them might not be the right move. Please advise @parlough!

[dart-github-bot]

Visit the preview URL for this PR (updated for commit e3a3042):

https://dart-dev--pr6211-api-links-xpdvz2h7.web.app

[parlough]

But I didn't account for the second bullet, any possible main/dev/beta redirects, will that be an issue?

We haven't used the functionality of deploying the site with beta/dev/main versions (and corresponding api.dart.dev links) in a long long time, so I think dropping these is fine. It will also make adding new links simpler and more consistent.

Any links to docs that are not yet on stable can manually add beta or dev.

I also came across this note that uses site.sdkInfo.channel as a condition...So I'm starting to think that blanket-removing all of them might not be the right move. Please advise @parlough!

As mentioned, we haven't used the functionality of the site documenting a beta/dev version, so I think this change is fine. We might consider dropping its usage in the note in a follow-up PR too.

[parlough]

Thanks for fixing these links @MaryaBelanger!

[MaryaBelanger]

@parlough I just did a quick check and it doesn't look like it, but can you confirm this same kind of thing doesn't need to be applied to the flutter site? I did see some links in a site-shared file ("writing for the dart and flutter websites") that use {{site.dart-api}}