Fix GitHub CI: ininstance check

Author: bernhardkaindl

tests/test_pci.py

@@ -166,7 +166,6 @@ def test_videoclass_by_mock_calls(fp):
     def mock_lspci_using_open_testfile(fp):
         """Mock xcp.pci.PCIDevices.Popen() using open(tests/data/lspci-mn)"""
         with open("tests/data/lspci-mn", "rb") as fake_data:
-            if sys.version_info >= (3, 6):
-                assert isinstance(fp, FakeProcess)
+            assert isinstance(fp, FakeProcess)
             fp.register_subprocess(["lspci", "-mn"], stdout=fake_data.read())
         return PCIDevices()