[Issue 14519] Get rid of unicode validation in string processing

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=14519

--- Comment #39 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
*** Issue 22473 has been marked as a duplicate of this issue. ***

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