crypto: tools/ccp - Remove unused variable

the variable is never referenced in the code, just remove them.
Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

tools/crypto/ccp/dbc.c

@@ -57,7 +57,6 @@ int process_param(int fd, int msg_index, __u8 *signature, int *data)
 		.msg_index = msg_index,
 		.param = *data,
 	};
-	int ret;
 
 	assert(signature);
 	assert(data);