Server 2.4.0, app 2.11.1: ABRP forwarding removed from the server

The car sends live data to ABRP itself, and the car and the server go
over the same mobile connection: when the car cannot reach ABRP, it
cannot reach the server either, so the server's fallback bought
nothing. The forwarder, its ABRP_* settings and abrpSentUtc are gone;
the server only stores. The app stops sending abrpSentUtc (the server
ignores unknown fields, so 2.11.0 keeps working) and its texts no longer
promise a server fallback.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

server/validate.go

@@ -273,11 +273,6 @@ func validateTelemetryBatch(body []byte, now time.Time) (TelemetryBatch, error)
 		return TelemetryBatch{}, invalid("samples is invalid")
 	}
 	batch := TelemetryBatch{InstallationID: id, Samples: make([]TelemetrySample, 0, len(raw))}
-	if o.has("abrpSentUtc") {
-		if batch.AbrpSentUTC, err = integer(o["abrpSentUtc"], "abrpSentUtc"); err != nil {
-			return TelemetryBatch{}, err
-		}
-	}
 	latest := now.Add(maxClockAhead).Unix()
 	for i, entry := range raw {
 		name := fmt.Sprintf("samples[%d]", i)