tests: Remove Cygwin WinMain workaround
tests: Remove Cygwin WinMain workaround

Former-commit-id: 103eb591e1b91aab028e9b18fceec3490be50968
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin