[Issue 10318] Built-in array sort usage warning, then deprecation, and finally removal

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=10318
Issue 10318 depends on issue 5124, which changed state.

Issue 5124 Summary: Make std.algorithm.sort weakly pure
https://issues.dlang.org/show_bug.cgi?id=5124

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

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