llvm-project

163871c2 - [Support] Remove workarounds for building with mingw.org toolchains (#145683)

[Support] Remove workarounds for building with mingw.org toolchains (#145683) Assume that mingw builds are made with mingw-w64 headers. The old mingw.org distribution isn't even accessible at the moment, and their project hosting site (osdn.net) seems to have been down for a couple of years, and their old project hosting (at sourceforge.net) hasn't been updated since 2018.