It was removed from .NET 8 in https://github.com/dotnet/runtime/commit/de5a04b2d7d184c5a9121b56cd51c713f72def76. i.e. all currently supported framework versions don't use this lib.
It was removed from .NET 8 in dotnet/runtime@de5a04b. i.e. all currently supported framework versions don't use this lib.