formula_creator: ENV.deparallelize is only for autotools

[p-linnane]

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This only functions for autotools, so let's not add it to all the other types of formulae.

[carlocab]

I think it works for anything that uses make?

[ZhongRuoyu]

I think it works for anything that uses make?

Yea, it works with CMake in most cases too, because CMake uses Unix Makefiles as a default generator. We once had ENV.deparallelize in llvm (Homebrew/homebrew-core#138176 (comment)).

[Bo98]

It's usually harder to make bad Makefiles when CMake does a lot of it for you, so I'm impressed by those who do need it.

I guess it maybe happens to things that start bypassing CMake targets and pass flags manually.

[p-linnane]

I can open a PR to add it to the cmake builds as well if that helps?

[Bo98]

Tbh seems better as a Formula Cookbook documentation

[MikeMcQuaid]

Yeh, I'd be fine with removing from brew create altogether and instead, as @Bo98, just mention in cookbook. It's a bit of a footman given how fucking slow it makes things and is basically just an upstream bug 😭

[p-linnane]

Opened #16701 to remove from formula_creator. It's already mentioned twice in the Formula Cookbook.