gh-120686: remove unused internal c api functions

Objects/object.c

@@ -1124,17 +1124,6 @@ _PyObject_GetAttrId(PyObject *v, _Py_Identifier *name)
     return result;
 }
 
-int
-_PyObject_SetAttrId(PyObject *v, _Py_Identifier *name, PyObject *w)
-{
-    int result;
-    PyObject *oname = _PyUnicode_FromId(name); /* borrowed */
-    if (!oname)
-        return -1;
-    result = PyObject_SetAttr(v, oname, w);
-    return result;
-}
-
 int
 _PyObject_SetAttributeErrorContext(PyObject* v, PyObject* name)
 {

Objects/typeobject.c

@@ -2705,15 +2705,6 @@ _PyObject_LookupSpecial(PyObject *self, PyObject *attr)
     return res;
 }
 
-PyObject *
-_PyObject_LookupSpecialId(PyObject *self, _Py_Identifier *attrid)
-{
-    PyObject *attr = _PyUnicode_FromId(attrid);   /* borrowed */
-    if (attr == NULL)
-        return NULL;
-    return _PyObject_LookupSpecial(self, attr);
-}
-
 static PyObject *
 lookup_maybe_method(PyObject *self, PyObject *attr, int *unbound)
 {
@@ -5497,16 +5488,6 @@ _PyType_Lookup(PyTypeObject *type, PyObject *name)
     return res;
 }
 
-PyObject *
-_PyType_LookupId(PyTypeObject *type, _Py_Identifier *name)
-{
-    PyObject *oname;
-    oname = _PyUnicode_FromId(name);   /* borrowed */
-    if (oname == NULL)
-        return NULL;
-    return _PyType_Lookup(type, oname);
-}
-
 static void
 set_flags(PyTypeObject *self, unsigned long mask, unsigned long flags)
 {