Do not #include <stdio.h> since Python.h already does that.
diff --git a/Doc/ext/run-func.c b/Doc/ext/run-func.c
index fb2a9ae..842f15a 100644
--- a/Doc/ext/run-func.c
+++ b/Doc/ext/run-func.c
@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include <Python.h>
 
 int