[Issue 13717] `split` no longer defined by std.string

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13717

--- Comment #16 from hsteoh at quickfur.ath.cx ---
Hmm, you're right. This is not good. :-( I can't think of any non-broken way to
work around this problem. Looks like we'll have to put those public imports
back until we can find a better solution. :-(

--