Clean up of redundant compiler definitions (#913)

CC1101_FREQUENCY
ONBOARD_LED
RF_RECEIVER_GPIO

Co-authored-by: Northern Man <sgracey@Heisenberg.local>

main/ZgatewayRTL_433.ino

@@ -32,9 +32,6 @@
 
 #  include <rtl_433_ESP.h>
 
-#  define CC1101_FREQUENCY 433.92
-#  define ONBOARD_LED      2
-
 char messageBuffer[JSON_MSG_BUFFER];
 
 rtl_433_ESP rtl_433(-1); // use -1 to disable transmitter

platformio.ini

@@ -119,7 +119,7 @@ smartrc-cc1101-driver-lib = SmartRC-CC1101-Driver-Lib@2.5.5
 stl = https://github.com/mike-matera/ArduinoSTL.git#7411816
 shtc3 = https://github.com/sparkfun/SparkFun_SHTC3_Arduino_Library
 somfy_remote=Somfy_Remote_Lib@0.2.0
-rtl_433_ESP = https://github.com/NorthernMan54/rtl_433_ESP#9ea4e3b
+rtl_433_ESP = https://github.com/NorthernMan54/rtl_433_ESP#38ee89a
 
 [env]
 framework = arduino
@@ -546,6 +546,7 @@ build_flags =
   '-DZradioCC1101="CC1101"'
   '-DZgatewayRTL_433="rtl_433"'
   '-DGateway_Name="OpenMQTTGateway_rtl_433_ESP"'
+  '-DRF_RECEIVER_GPIO=4'
 ;  '-DRTL_DEBUG=4'        ; enable rtl_433 verbose device decode
 
 [env:ttgo-lora32-v1]