Remove unused PyStackRef_Transfer function

Author: markshannon

Include/internal/pycore_stackref.h

@@ -153,20 +153,10 @@ _PyStackRef_DUP(_PyStackRef ref, const char *filename, int linenumber)
 }
 #define PyStackRef_DUP(REF) _PyStackRef_DUP(REF, __FILE__, __LINE__)
 
-static inline _PyStackRef
-_PyStackRef_Transfer(_PyStackRef ref, const char *filename, int linenumber)
-{
-    PyObject *obj = _Py_stackref_close(ref);
-    return _Py_stackref_create(obj, filename, linenumber);
-}
-#define PyStackRef_Transfer(REF) _PyStackRef_Transfer(REF, __FILE__, __LINE__)
-
 #define PyStackRef_CLOSE_SPECIALIZED(stackref, dealloc) PyStackRef_CLOSE(stackref)
 
 #else
 
-#define PyStackRef_Transfer(REF) (REF)
-
 typedef union _PyStackRef {
     uintptr_t bits;
 } _PyStackRef;