Remove unnecessary base64.h inclusion

All the TNC base64 operations are within tncs.c, so there is no point in
including base64.h into eap_server_tnc.c.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/eap_server/eap_server_tnc.c

@@ -9,7 +9,6 @@
 #include "includes.h"
 
 #include "common.h"
-#include "base64.h"
 #include "eap_i.h"
 #include "tncs.h"