Update tuple_ops.c

Author: BobTheBuidler

mypyc/lib-rt/tuple_ops.c

@@ -5,9 +5,6 @@
 #include <Python.h>
 #include "CPy.h"
 
-// System-wide empty tuple constant
-PyObject * __mypyc_empty_tuple__ = NULL;
-
 PyObject *CPySequenceTuple_GetItem(PyObject *tuple, CPyTagged index) {
     if (CPyTagged_CheckShort(index)) {
         Py_ssize_t n = CPyTagged_ShortAsSsize_t(index);