contrib: Remove superfluous config.h inclusion

contrib/spnego/spnego_asn1.h

@@ -2,8 +2,6 @@
 #ifndef __SPNEGO_ASN1_CONF_H_
 #define __SPNEGO_ASN1_CONF_H_
 
-#include "config.h"
-
 #include <libtasn1.h>
 
 extern const asn1_static_node spnego_asn1_conf[];