Remove fs/mod.ts

[ry]

Fixes #1539

[bartlomieju]

This will break an enormous amount of code in the wild and doesn't solve the issue of requiring unstable at all. We should at least deprecate this module for a few release before removing completely.

[ry]

We make breaking changes in std often. I would just remove this...

[LionC]

We make breaking changes in std often. I would just remove this...

@ry does that mean that you plan to cover even the more abstract FS related cases (e.g. walk) in the runtime API in the future? Or do you propose to straight up not cover them at all?

[bartlomieju]

We make breaking changes in std often. I would just remove this...

I'm still not in favor of this change. This make it more cumbersome for users to import FS APIs (now you have to add 5 imports instead of one) without an obvious benefit. The root issues is still not resolved with this change.

[kt3k]

How about only removing ./copy.ts from fs/mod.ts, which also resolves #1539 with less breaking changes.

[ry]

@kt3k Ok I've made that change.

[kt3k]

LGTM