Remove <eval.h> include. This was indirectly included via Python.h, and Python
3.11 removed the header entirely.

Author: Stefano Rivera <stefanor@debian.org>
Bug-Debian: https://bugs.debian.org/1027815
Forwarded: not-needed
--- a/src/python_class.h
+++ b/src/python_class.h
@@ -35,7 +35,6 @@
 #include <locale.h>
 #include "Python.h"
 #include "compile.h"
-#include "eval.h"
 #include "fileops.h"
 
 #ifndef SWIG