Drop the deprecated download

[PallHaraldsson]

No description provided.

[fredrikekre]

There is no reason to do this before 2.0(?).

[PallHaraldsson]

Maybe there's no reason to do this right now (I see it's part of "the API", exported from Base), is it allowed to change the API, in some 1.x, or is there only a syntax guarantee?

It might not be best to drop at the last minute for 1.8... but I'm still sure how far we would get with PkgEval. I think I made sure Julia itself will not fail (could be cleaned up better since it seems I can't drop files in the web interface of Github, and would need NEWS).

I would like to drop mbedTLS (and more), that's the main reason for this, see #43677 (comment) (since "we are underresourced in the security domain").

There's a very easy workaround for all users, use Downloads.download()

[PallHaraldsson]

Maybe we don't actually need to drop download. It already uses package Download, I'm trying to figure out if we can drop mbedTLS, and it's unclear to me if used by Julia, as opposed to Download pkg, or Pkg.

[PallHaraldsson]

Closing. This could have worked, except for some seeming minor issues: "Error: undefined binding 'Base.download' in @docs block in src/base/file.md:3-66"