fix comment in cache.h
reported on github but repository was lost.
@@ -34,8 +34,7 @@ typedef int cache_constructor_t(void* obj, void* notused1, int notused2);
* returned to the operating system.
*
* @param obj pointer to the object to clean up.
- * @param notused1 This parameter is currently not used.
- * @param notused2 This parameter is currently not used.
+ * @param notused This parameter is currently not used.
* @return you should return 0, but currently this is not checked
*/
typedef void cache_destructor_t(void* obj, void* notused);
