*-pc-windows-gnu target CI is broken

[Hpmason]

GitHub Actions for x86_64-pc-windows-gnu and i686-pc-windows-gnu are failing again. The following error message occurs during the Set Up MinGW step of the CI workflow:

Remove-Item: D:\a\_temp\9873c7c8-4f3e-4a8c-9439-180e50978186.ps1:140
Line |
 140 |          Remove-Item (Join-Path $mingw_lib 'libpthread.dll.a')
     |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Cannot find path
     | 'C:\ProgramData\chocolatey\lib\mingw\tools\install\mingw64\x86_64-w64-mingw32\lib\libpthread.dll.a' because it
     | does not exist.

Error: Process completed with exit code 1.

Examples of failed CI can be found in the #34 PR