Remove windows-specific workarounds for mmap. - #9228

@bsipocz, @astrofrog, @Cadair - I'm trying to test a windows-specific change. Is that still tested by default? I don't see appveyor anymore... If not, how can I test it?

Ah, I see windows is now done on travis. Nice! (and it fails, so useful for the test...)

closing since the special treatment for windows is clearly still required

@mhvk - yes, we're gradually moving away from appveyor in favour of travis and azure depending on the repo (the configs set up by ci-helpers are seriously broken anyway).

Ah, thanks. It was nice to see that travis now supports windows.

Re: Windows on Travis -- convenient but very slow. I am hoping we switch to Azure soon, though it is still missing a [skip ci] feature that we use a lot.

My distrust of microsoft prevents me from being too keen on azure... (though really, they have been a bit better in the last decade...)

They've changed a lot in the past few years. At least that's the generic understanding talking to either insiders or outsiders of the company.