Remove error prints from ETCP timestamp checks

src/etcp.c

@@ -445,18 +445,14 @@ static void ack_timeout_check(void* arg) {
     while (current = etcp->input_wait_ack->head) {
         struct INFLIGHT_PACKET* pkt = (struct INFLIGHT_PACKET*)current;
         
-        // Check for invalid timestamp
+        // Check for invalid timestamp - silent fix, no error output
         if (pkt->last_timestamp == 0) {
-            DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "[%s] ack_timeout_check: packet seq=%u has last_timestamp=0, not sent yet!",
-                       etcp->log_name, pkt->seq);
             // Schedule timer to check again later
             etcp->retrans_timer = uasync_set_timeout(etcp->instance->ua, timeout, etcp, ack_timeout_check);
             return;
         }
         
         if (pkt->last_timestamp > now) {
-            DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "[%s] ack_timeout_check: packet seq=%u has last_timestamp=%llu > now=%llu, clock went backwards!",
-                       etcp->log_name, pkt->seq, (unsigned long long)pkt->last_timestamp, (unsigned long long)now);
             // Fix the timestamp to prevent overflow
             pkt->last_timestamp = now;
         }