Revert back to original Win CI install script

Since msys2/MSYS2-packages#2050 was fixed, we can now revert back to the
original install script.

Signed-off-by: Jakub Konka <kubkon@jakubkonka.com>
0e2d858d69Jakub Konka committed on 10/4/2020, 9:53:07 AMparent8170a3d
1 file changedLine totals unavailable