undo Xcode 13 GM workaround

[weissi]

Motivation:

Xcode 13 is really quite old (3 major releases and it was the GM release anyway) and this workaround can cause other issues.

Modifications:

• Remove the Xcode 13 GM workaround.

Result:

Better, possibly faster code.

[weissi]

oha, this actually trigger a compiler crash :|

[weissi]

oha, this actually trigger a compiler crash :|

worked around the compiler crash.

[Lukasa]

@weissi The formatter wants you to remove -> Void from your function declaration. As you're working around a compiler crash, I don't want to just unilaterally make that change for you without you reproducing whether the compiler continues not to crash with this spelling.