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

[via Digitalmars-d-bugs]

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

--- Comment #8 from Илья Ярошенко <ilyayaroshe...@gmail.com> ---
And we can not deprecate them too because there is now deprecation for imports
;-(

--