fix mingw tests

gcontini

2021-05-20 befd75ebbf7fe3b0ce5b91a82bc232e84fc5d3fc

 src/library/os/CMakeLists.txt

@@ -16,7 +16,6 @@
         openssl/signature_verifier.cpp 
        execution_environment_common.cpp 
        windows/execution_environment.cpp
        windows/isvm/BIOSReader.cpp
         windows/os_win.cpp
         windows/network.cpp)
   ENDIF(UNIX)
@@ -29,7 +28,6 @@
        windows/signature_verifier.cpp 
        execution_environment_common.cpp 
        windows/execution_environment.cpp
        windows/isvm/BIOSReader.cpp
        windows/os_win.cpp
        windows/network.cpp)
ENDIF(UNIX OR OPENSSL_FOUND)