[dmd-internals] What is the point of runnable/testdate.d?

[Jonathan M Davis]

>From what I can tell, it's just testing std.date. I would have thought that 
that's the sort of testing that you'd do in std.date, not dmd. And since 
std.date has now been deprecated, it seems that that's breaking dmd's tests.

So, does these tests need to be rewritten for std.datetime, or should we just 
get rid ouf them? I don't understand why the tests exist in the first place. 
It's the sort of thing that I would have expected to see in std.date, not dmd.

- Jonathan M Davis