Remove declaration for unused variable.
diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index 3577a29..dacafe6 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -783,7 +783,6 @@
 static PyObject *
 complex_richcompare(PyObject *v, PyObject *w, int op)
 {
-    int c;
     Py_complex i, j;
     PyObject *res;