[FEM] remove checks for Python 2

src/Mod/Fem/femtest/app/test_open.py

@@ -129,10 +129,6 @@ class TestObjectOpen(unittest.TestCase):
     def test_femobjects_open_de9b3fb438(
         self
     ):
-        # migration modules do not import on Python 2 thus this can not work
-        if sys.version_info.major < 3:
-            return
-
         # the number in method name is the FreeCAD commit the document was created with
         # https://github.com/FreeCAD/FreeCAD/commit/de9b3fb438
         # the document was created by running the object create unit test