[Issue 11989] Phase out TickDuration

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=11989

--- Comment #6 from Jonathan M Davis <issues.dlang at jmdavisProg.com> ---
Oh, nice. The last time that I tried to do this, I ran into deprecation
messages from templates that really shouldn't have been triggering deprecation
messages (IIRC from code that could use either Duration or TickDuration), and I
concluded that the compiler was going to need some improvements before it could
be done. I'm not sure if that issue was
https://issues.dlang.org/show_bug.cgi?id=23800 or something else, but at least
you figured out how to make it work.

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