Revert subclassing of future.types from newobject

We don't have a compelling need for this yet and it interferes with e.g. long(newstr(u'123')) on Py2

Author: edschofield

future/types/newbytes.py

@@ -29,7 +29,7 @@ def __instancecheck__(cls, instance):
             return issubclass(instance.__class__, cls)
 
 
-class newbytes(with_metaclass(BaseNewBytes, _builtin_bytes, newobject)):
+class newbytes(with_metaclass(BaseNewBytes, _builtin_bytes)):
     """
     A backport of the Python 3 bytes object to Py2
     """

future/types/newdict.py

@@ -34,7 +34,7 @@ def __instancecheck__(cls, instance):
             return issubclass(instance.__class__, cls)
 
 
-class newdict(with_metaclass(BaseNewDict, _builtin_dict, newobject)):
+class newdict(with_metaclass(BaseNewDict, _builtin_dict)):
     """
     A backport of the Python 3 dict object to Py2
     """

future/types/newint.py

@@ -28,7 +28,7 @@ def __instancecheck__(cls, instance):
             return issubclass(instance.__class__, cls)
 
 
-class newint(with_metaclass(BaseNewInt, long, newobject)):
+class newint(with_metaclass(BaseNewInt, long)):
     """
     A backport of the Python 3 int object to Py2
     """

future/types/newlist.py

@@ -31,7 +31,7 @@ def __instancecheck__(cls, instance):
             return issubclass(instance.__class__, cls)
 
 
-class newlist(with_metaclass(BaseNewList, _builtin_list, newobject)):
+class newlist(with_metaclass(BaseNewList, _builtin_list)):
     """
     A backport of the Python 3 list object to Py2
     """

future/types/newstr.py

@@ -61,7 +61,7 @@ def __instancecheck__(cls, instance):
             return issubclass(instance.__class__, cls)
 
 
-class newstr(with_metaclass(BaseNewStr, unicode, newobject)):
+class newstr(with_metaclass(BaseNewStr, unicode)):
     """
     A backport of the Python 3 str object to Py2
     """