zebra: remove netlink buffer size log message

... really not much point in printing this.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

zebra/kernel_netlink.c

@@ -271,9 +271,6 @@ static int netlink_recvbuf(struct nlsock *nl, uint32_t newsize)
 			     safe_strerror(errno));
 		return -1;
 	}
-
-	zlog_info("Setting netlink socket receive buffer size: %u -> %u",
-		  oldsize, newsize);
 	return 0;
 }