Fix warnings if YYJSON_MSC_VER doesn't exist

[JohannAnhofer]

Fixes two more warnings

[danielaparker]

Indeed YYJSON_MSC_VER doesn't exist, not in jsoncons, it's a macro from the "C" library yyjson. I believe it unintentionally ended up in compiler_support.hpp as a result of some experimental work inspired by yyjson, but neither macro that references it, JSONCONS_NOINLINE or JSONCONS_ALIGN, is used in the existing code base. Instead of the fix, can you update the PR to remove those two macros instead?

Thanks for spotting this.

[JohannAnhofer]

ok, removing dead code is always a good idea.