Remove check V320 in PY3

Remove checks:no_direct_use_of_unicode_function, there is no unicode builtin in
python3.

Change-Id: Ief8c922637e562fcab20f3c97b496b950c7f36ea

HACKING.rst

@@ -10,7 +10,6 @@ Vitrage Specific Commandments
 [V317] assertEqual(type(A), B) sentences not allowed
 [V318] assertEqual(A, None) or assertEqual(None, A) sentences not allowed
 [V319] Don't translate logs
-[V320] Use six.text_type() instead of unicode()
 [V321] contextlib.nested is deprecated
 [V322] use a dict comprehension instead of a dict constructor with a sequence of key-value pairs
 [V323] Do not use xrange. Use range, or six.moves.range

tox.ini

@@ -73,7 +73,6 @@ extension =
     V329 = checks:check_assert_true_false
     V317 = checks:assert_equal_type
     V319 = checks:no_translate_logs
-    V320 = checks:no_direct_use_of_unicode_function
     V327 = checks:no_mutable_default_args
     V321 = checks:check_no_contextlib_nested
     V322 = checks:dict_constructor_with_list_copy

vitrage/hacking/checks.py

@@ -70,16 +70,6 @@ def no_translate_logs(logical_line):
         yield (0, "V319: Don't translate logs")
 
 
-@core.flake8ext
-def no_direct_use_of_unicode_function(logical_line):
-    """Check for use of unicode() builtin
-
-    V320
-    """
-    if unicode_func_re.match(logical_line):
-        yield(0, "V320: Use six.text_type() instead of unicode()")
-
-
 @core.flake8ext
 def check_no_contextlib_nested(logical_line):
     msg = ("V321: contextlib.nested is deprecated since Python 2.7. See "

vitrage/tests/unit/hacking/test_hacking.py

@@ -48,19 +48,6 @@ class HackingTestCase(base.BaseTest):
             self.assertThat(list(checks.no_translate_logs(bad)),
                             matchers.HasLength(1))
 
-    def test_no_direct_use_of_unicode_function(self):
-        self.assertThat(list(checks.no_direct_use_of_unicode_function(
-            "unicode('the party don't start til the unicode walks in')")),
-            matchers.HasLength(1))
-        self.assertThat(list(checks.no_direct_use_of_unicode_function(
-            """unicode('something '
-                       'something else""")), matchers.HasLength(1))
-        self.assertThat(list(checks.no_direct_use_of_unicode_function(
-            "six.text_type('party over')")), IsEmpty())
-        self.assertThat(list(checks.no_direct_use_of_unicode_function(
-            "not_actually_unicode('something completely different')")),
-            IsEmpty())
-
     def test_no_contextlib_nested(self):
         self.assertThat(list(checks.check_no_contextlib_nested(
             "with contextlib.nested(")), matchers.HasLength(1))