bpo-33958: Doc: Remove unused variable in example (GH-7927)

Doc/includes/run-func.c

@@ -3,7 +3,7 @@
 int
 main(int argc, char *argv[])
 {
-    PyObject *pName, *pModule, *pDict, *pFunc;
+    PyObject *pName, *pModule, *pFunc;
     PyObject *pArgs, *pValue;
     int i;