[Issue 20180] Deprecated unittests should not be deprecated functions

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20180

Mathias LANG <pro.mathias.lang at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |pro.mathias.lang at gmail.com

--- Comment #2 from Mathias LANG <pro.mathias.lang at gmail.com> ---
What about using `__traits(isDeprecated)` ?

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