closes bpo-38648: Remove double tp_free slot in Python-ast.c. (GH-17002)

This looks like a typo due to copy-paste.
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 3a821cc..52495e9 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -751,7 +751,6 @@
     {Py_tp_init, ast_type_init},
     {Py_tp_alloc, PyType_GenericAlloc},
     {Py_tp_new, PyType_GenericNew},
-    {Py_tp_free, PyType_GenericNew},
     {Py_tp_free, PyObject_GC_Del},
     {0, 0},
 };
diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index e2c703d..d5465d7 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -1244,7 +1244,6 @@
     {Py_tp_init, ast_type_init},
     {Py_tp_alloc, PyType_GenericAlloc},
     {Py_tp_new, PyType_GenericNew},
-    {Py_tp_free, PyType_GenericNew},
     {Py_tp_free, PyObject_GC_Del},
     {0, 0},
 };