Remove useless header in _isl.c

diff --git a/pypol/_isl.c b/pypol/_isl.c
index fe29ec5..828e10d 100644 (file)
--- a/pypol/_isl.c
+++ b/pypol/_isl.c
@@ -1,5 +1,4 @@
 #include <Python.h>
-#include <stdlib.h>
 
 #include <isl/constraint.h>
 #include <isl/set.h>