Revert "implement __hash__() and __eq__() for ctypedefs by delegating to the base type"

    This breaks comparing typedef types and results
    in funky things such as getting temporaries of
    different types.

This reverts commit e3838e42.

Cython/Compiler/PyrexTypes.py

@@ -333,12 +333,6 @@ class CTypedefType(BaseType):
     def __repr__(self):
         return "<CTypedefType %s>" % self.typedef_cname
 
-    def __hash__(self):
-        return hash(self.typedef_base_type)
-
-    def __eq__(self, other):
-        return other == self.typedef_base_type
-
     def __str__(self):
         return self.typedef_name