easy: Removed redundant HTTP authentication include files

lib/easy.c

@@ -64,7 +64,6 @@
 #include "easyif.h"
 #include "select.h"
 #include "sendf.h" /* for failf function prototype */
-#include "curl_ntlm.h"
 #include "connect.h" /* for Curl_getconnectinfo */
 #include "slist.h"
 #include "amigaos.h"