Correct test assertions for E721

* `type(a) is type(b)` should still fail
* same for `type(a) != type(b) or type(a) == type(ccc)`
* We cannot assume `res == types.IntType` is wrong as the identity
  of the objects is not known at check time, either way
  it shouldn't be a E721 as it doesn't involve type(...) function
  as described in PEP8

Author: asfaltboy

pycodestyle.py

@@ -1465,7 +1465,6 @@ def comparison_type(logical_line, noqa):
     common base class, basestring, so you can do:
 
     Okay: if isinstance(obj, basestring):
-    Okay: if type(a1) is type(b1):
     """
     match = COMPARE_TYPE_REGEX.search(logical_line)
     if match and not noqa:

testsuite/E72.py

@@ -4,7 +4,7 @@
 #: E721
 if type(res) != type(""):
     pass
-#: E721
+#: Okay
 import types
 
 if res == types.IntType:
@@ -47,8 +47,6 @@
     pass
 if isinstance(res, types.MethodType):
     pass
-if type(a) != type(b) or type(a) == type(ccc):
-    pass
 #: Okay
 def func_histype(a, b, c):
     pass