remove duplicate print output (minor)

the URB content is also shown in process_usb_msg

Change-Id: I3985449daf71d6a450b3339e9feaa26528b86535

src/simtrace2-remsim_client.c

@@ -506,7 +506,6 @@ static void run_mainloop(struct cardem_inst *ci)
 		}
 		/* dispatch any incoming data */
 		if (xfer_len > 0) {
-			printf("URB: %s\n", osmo_hexdump(buf, xfer_len));
 			process_usb_msg(ci, buf, xfer_len);
 			msg_count++;
 			byte_count += xfer_len;