remove ethernet code from this variant, remove unused radio chip code

variants/rak2560/platformio.ini

@@ -1,4 +1,4 @@
-; The very slick RAK wireless RAK 4631 / 4630 board - Unified firmware for 5005/19003, with or without OLED RAK 1921
+; Firmware for the WisMesh HUB RAK2560, including a onewire module to talk to the RAK 9154 solar battery.
 [env:rak2560]
 extends = nrf52840_base
 board = wiscore_rak4631
@@ -6,6 +6,9 @@ board_check = true
 build_flags = ${nrf52840_base.build_flags} -Ivariants/rak2560 -D RAK_4631
   -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m4/fpv4-sp-d16-hard"
   -DGPS_POWER_TOGGLE ; comment this line to disable triple press function on the user button to turn off gps entirely.
+  -DRADIOLIB_EXCLUDE_SX128X=1
+  -DRADIOLIB_EXCLUDE_SX127X=1
+  -DRADIOLIB_EXCLUDE_LR11X0=1
   -DHAS_RAKPROT=1 ; Define if RAk OneWireSerial is used (disables GPS)
 build_src_filter = ${nrf52_base.build_src_filter} +<../variants/rak2560> +<mesh/eth/> +<mesh/api/> +<mqtt/>
 lib_deps = 

variants/rak2560/variant.h

@@ -250,8 +250,6 @@ SO GPIO 39/TXEN MAY NOT BE DEFINED FOR SUCCESSFUL OPERATION OF THE SX1262 - TG
 
 #define HAS_RTC 1
 
-#define HAS_ETHERNET 1
-
 #define RAK_4631 1
 
 #define HALF_UART_PIN PIN_SERIAL1_RX
@@ -265,9 +263,6 @@ SO GPIO 39/TXEN MAY NOT BE DEFINED FOR SUCCESSFUL OPERATION OF THE SX1262 - TG
 #error pin 15 collision
 #endif
 
-#define PIN_ETHERNET_RESET 21
-#define PIN_ETHERNET_SS PIN_EINK_CS
-#define ETH_SPI_PORT SPI1
 #define AQ_SET_PIN 10
 
 #ifdef __cplusplus