Tests: removed test case that reuses rootfs path.

Different applications cannot reuse the same rootfs path
if not using namespaces because of globally visible
builtin mount points.

test/test_python_isolation_chroot.py

@@ -15,10 +15,6 @@ class TestPythonIsolation(TestApplicationPython):
             'rootfs': temp_dir,
         }
 
-        self.load('empty', isolation=isolation)
-
-        assert self.get()['status'] == 200, 'python chroot'
-
         self.load('ns_inspect', isolation=isolation)
 
         assert (