Fix ACI unit test on Python 3.7.0.

The previous logic was only needed for pre-release versions of 3.7.

(cherry picked from commit c0bf9815c9)

test/units/module_utils/network/aci/test_aci.py

@@ -261,8 +261,6 @@ class AciRest(unittest.TestCase):
             error_text = to_native(u"Unable to parse output as XML, see 'raw' output. None (line 0)", errors='surrogate_or_strict')
         elif PY2:
             error_text = "Unable to parse output as XML, see 'raw' output. Document is empty, line 1, column 1 (line 1)"
-        elif sys.version_info >= (3, 7):
-            error_text = to_native(u"Unable to parse output as XML, see 'raw' output. None (line 0)", errors='surrogate_or_strict')
         else:
             error_text = "Unable to parse output as XML, see 'raw' output. Document is empty, line 1, column 1 (<string>, line 1)"