Remove uses of 'in' on extern(C) functions

[Geod24]

It is forbidden by DMD master.

[dlang-bot]

Thanks for your pull request, @Geod24!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✗	15862	critical	Functions that return types with mutable indirections should be weakly pure, not strongly pure

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#8509"

[thewilsonator]

std/typecons.d(6653): Error: undefined identifier `pureGcRemoveRange`
std/typecons.d(6640): Error: undefined identifier `pureGcAddRange`
std/typecons.d(6653): Error: undefined identifier `pureGcRemoveRange`

[Geod24]

Fixed

[RazvanN7]

It looks like dscanner cannot find the druntime related files.

[Geod24]

Let's see if a rebase helps

[Geod24]

The problem is actually:

std/typecons.d(6602:20)[warn]: Local imports should specify the symbols being imported to avoid hiding local symbols.

But the D-Scanner check seems to have its own issues

[Geod24]

Style passed AND is readable 🎉

[Geod24]

@RazvanN7 : Commit are atomic, don't squash them.