closes bpo-32980 Remove _PyFrame_Init (GH-5965)

Include/pylifecycle.h

@@ -148,7 +148,6 @@ PyAPI_FUNC(int) _PySys_EndInit(PyObject *sysdict, _PyMainInterpreterConfig *conf
 PyAPI_FUNC(_PyInitError) _PyImport_Init(PyInterpreterState *interp);
 PyAPI_FUNC(void) _PyExc_Init(PyObject * bltinmod);
 PyAPI_FUNC(_PyInitError) _PyImportHooks_Init(void);
-PyAPI_FUNC(int) _PyFrame_Init(void);
 PyAPI_FUNC(int) _PyFloat_Init(void);
 PyAPI_FUNC(int) PyByteArray_Init(void);
 PyAPI_FUNC(_PyInitError) _Py_HashRandomization_Init(const _PyCoreConfig *);

Objects/frameobject.c

@@ -552,14 +552,6 @@ PyTypeObject PyFrame_Type = {
 
 _Py_IDENTIFIER(__builtins__);
 
-int _PyFrame_Init()
-{
-    /* Before, PyId___builtins__ was a string created explicitly in
-       this function. Now there is nothing to initialize anymore, but
-       the function is kept for backward compatibility. */
-    return 1;
-}
-
 PyFrameObject* _Py_HOT_FUNCTION
 _PyFrame_New_NoTrack(PyThreadState *tstate, PyCodeObject *code,
                      PyObject *globals, PyObject *locals)

Python/pylifecycle.c

@@ -690,9 +690,6 @@ _Py_InitializeCore(const _PyCoreConfig *core_config)
 
     _Py_ReadyTypes();
 
-    if (!_PyFrame_Init())
-        return _Py_INIT_ERR("can't init frames");
-
     if (!_PyLong_Init())
         return _Py_INIT_ERR("can't init longs");