[Issue 9298] some std.math functions not implemented for Win64

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=9298

e10s <electrolysis.jp at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |electrolysis.jp at gmail.com

--- Comment #2 from e10s <electrolysis.jp at gmail.com> ---
Since Visual Studio 2013, those currently disabled functions, nearbyint(),
lround(), remquo() and also remainder() have been potentially available.

C99 library support in Visual Studio 2013 | C++ Team Blog
https://devblogs.microsoft.com/cppblog/c99-library-support-in-visual-studio-2013/

In addition, because newer runtime libs are shipped with compiler packages
nowadays, basically no need to consider link errors due to missing functions.

It's a good time to unbind them.

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