Remove old nogil classes del statement

Cython/Compiler/Nodes.py

@@ -5981,8 +5981,6 @@ class DelStatNode(StatNode):
                     error(arg.pos, "Deletion of global C variable")
             elif arg.type.is_ptr and arg.type.base_type.is_cpp_class:
                 self.cpp_check(env)
-            elif arg.type.is_struct_or_union and arg.type.nogil:
-                pass # del nogil extension
             elif arg.type.is_cpp_class:
                 error(arg.pos, "Deletion of non-heap C++ object")
             elif arg.is_subscript and arg.base.type is Builtin.bytearray_type:
@@ -6011,10 +6009,6 @@ class DelStatNode(StatNode):
                 arg.generate_evaluation_code(code)
                 code.putln("delete %s;" % arg.result())
                 arg.generate_disposal_code(code)
-            elif arg.type.is_struct_or_union and hasattr(arg.type, "nogil") and arg.type.nogil:
-                # Whenever there will be a proper GC:
-                code.putln("Cy_DECREF(%s);" % arg.result())
-                #code.putln("free(&%s);" % arg.result())
            # else error reported earlier
 
     def annotate(self, code):