Remove unused argument for nbd_client()

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/nbd.c b/nbd.c
index a9f295f..7049998 100644
--- a/nbd.c
+++ b/nbd.c
@@ -393,7 +393,7 @@
 	return 0;
 }
 
-int nbd_client(int fd, int csock)
+int nbd_client(int fd)
 {
 	int ret;
 	int serrno;
@@ -427,7 +427,7 @@
     return -1;
 }
 
-int nbd_client(int fd, int csock)
+int nbd_client(int fd)
 {
     errno = ENOTSUP;
     return -1;