Remove unused RX boosted gain mode functions and related preprocessor directives across multiple variants

variants/nibble_screen_connect/target.cpp

@@ -42,18 +42,8 @@ void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
-mesh::LocalIdentity radio_new_identity() {
-  RadioNoiseListener rng(radio);
-  return mesh::LocalIdentity(&rng);
-}
-
-#if defined(USE_SX1262) || defined(USE_SX1268)
-void radio_set_rx_boosted_gain_mode(bool rxbgm) {
-  radio.setRxBoostedGainMode(rxbgm);
-}
-
-bool radio_get_rx_boosted_gain_mode() {
-  return radio.getRxBoostedGainMode();
-}
-#endif
+mesh::LocalIdentity radio_new_identity() {
+  RadioNoiseListener rng(radio);
+  return mesh::LocalIdentity(&rng);
+}