[refactor](trx-frontend-http): remove /set_fir_taps endpoint

Drop FirTapsQuery, the set_fir_taps handler, and its service
registration. Tap count is no longer user-configurable.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

src/trx-client/trx-frontend/trx-frontend-http/src/api.rs

@@ -847,19 +847,6 @@ pub async fn set_bandwidth(
     send_command(&rig_tx, RigCommand::SetBandwidth(query.hz)).await
 }
 
-#[derive(serde::Deserialize)]
-pub struct FirTapsQuery {
-    pub taps: u32,
-}
-
-#[post("/set_fir_taps")]
-pub async fn set_fir_taps(
-    query: web::Query<FirTapsQuery>,
-    rig_tx: web::Data<mpsc::Sender<RigRequest>>,
-) -> Result<HttpResponse, Error> {
-    send_command(&rig_tx, RigCommand::SetFirTaps(query.taps)).await
-}
-
 #[derive(serde::Deserialize)]
 pub struct SdrGainQuery {
     pub db: f64,
@@ -1557,7 +1544,6 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(set_ptt)
         .service(set_tx_limit)
         .service(set_bandwidth)
-        .service(set_fir_taps)
         .service(set_sdr_gain)
         .service(set_sdr_lna_gain)
         .service(set_sdr_agc)