Enable versions cmd tests on windows (#36974)

lib/spack/spack/test/cmd/versions.py

@@ -3,8 +3,6 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
-import sys
-
 import pytest
 
 from spack.main import SpackCommand
@@ -12,8 +10,6 @@
 
 versions = SpackCommand("versions")
 
-pytestmark = pytest.mark.skipif(sys.platform == "win32", reason="does not run on windows")
-
 
 def test_safe_only_versions():
     """Only test the safe versions of a package.