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

variants/heltec_e290/platformio.ini

@@ -6,7 +6,6 @@ build_flags =
   -I variants/heltec_e290
   -D Vision_Master_E290
   -D ARDUINO_USB_CDC_ON_BOOT=1
-  -D USE_SX1262
   -D RADIO_CLASS=CustomSX1262
   -D WRAPPER_CLASS=CustomSX1262Wrapper
   -D LORA_TX_POWER=22

variants/heltec_e290/target.cpp

@@ -52,13 +52,3 @@ mesh::LocalIdentity radio_new_identity() {
   RadioNoiseListener rng(radio);
   return mesh::LocalIdentity(&rng); // create new random identity
 }
-
-#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

variants/heltec_e290/target.h

@@ -27,8 +27,3 @@ uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
 void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
-
-#if defined(USE_SX1262) || defined(USE_SX1268)
-bool radio_get_rx_boosted_gain_mode();
-void radio_set_rx_boosted_gain_mode(bool rxbgm);
-#endif