Revert "feat: add alert, confirm, and prompt (#7507)"

[bartlomieju]

This reverts commit 0dcaea7.

Revert #7507 - only after landing I noticed controversy in the original issue (#4257).

CC @kt3k @kitsonk

[kt3k]

Security concern doesn't apply anymore because the same attack can be done with exiting APIs (such as Deno.stdin.readSync).

I agree with his second argument ( there is no reasonable way to use alert confirm prompt in a isomorphic way), but I believe this is not strongly against the addition of APIs.

I'd like @kitsonk to review my comment at #4257 (comment). My point (motivation) of this addition is that these are very useful for the beginners and learners. Maybe nobody use these in serious / production environment, but these helps learners easily interact with Deno APIs in casual manner (and I hope that promote the use of Deno especially for newcomers)

[kitsonk]

I am not a fan of this addition, but if I had a real problem with it, I would have spoken up in the PR. It doesn't "break" Deno, so I would rather have arguments about more serious things! 😉

[bartlomieju]

My views are in line with @kt3k opinion, closing without merge.