remove deprecated functions, fix typo and style

variants/lilygo_techo_card/target.h

@@ -26,8 +26,4 @@ extern EnvironmentSensorManager sensors;
 #endif
 
 bool radio_init();
-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();
-