mgcp-client: Remove impossible code path

read(4096 - 128) cannot return > 4096 - 128.

Change-Id: I352c3b28c8de6482277cb84cd0f51893494dc929
diff --git a/src/libosmo-mgcp-client/mgcp_client.c b/src/libosmo-mgcp-client/mgcp_client.c
index 3711f24..77de23f 100644
--- a/src/libosmo-mgcp-client/mgcp_client.c
+++ b/src/libosmo-mgcp-client/mgcp_client.c
@@ -726,10 +726,6 @@
 
 		msgb_free(msg);
 		return -1;
-	} else if (ret > 4096 - 128) {
-		LOGPMGW(mgcp, LOGL_ERROR, "Too much data: %s: %d\n", osmo_sock_get_name2(fd->fd), ret);
-		msgb_free(msg);
-		return -1;
 	}
 
 	msg->l2h = msgb_put(msg, ret);