tools: image-host: not allow keys to be missing

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ibae5d152244721926189fa3873d113bde212b4fb

tools/image-host.c

@@ -600,10 +600,6 @@ static int fit_config_process_sig(const char *keydir, void *keydest,
 	if (ret) {
 		printf("Failed to sign '%s' signature node in '%s' conf node\n",
 		       node_name, conf_name);
-
-		/* We allow keys to be missing */
-		if (ret == -ENOENT)
-			return 0;
 		return -1;
 	}