[Issue 19009] core.internal.hash.hashOf default hash (absent `toHash`) should be `@nogc`

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19009

--- Comment #1 from Nathan S. <n8sh.secondary at hotmail.com> ---
PR: https://github.com/dlang/druntime/pull/2228

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