Address PR review feedback from oltaco

- Remove extra blank line in companion_radio main.cpp before NRF52/STM32 block
- Revert unintended STM32_PLATFORM ETHERNET_ENABLED branch (no STM32 ethernet target exists, and it incorrectly included nrf52 headers)
- Drop renovate annotations from rak4631 platformio.ini (no renovate config in this repo)

examples/companion_radio/main.cpp

@@ -12,7 +12,6 @@ static uint32_t _atoi(const char* sp) {
   return n;
 }
 
-
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   #include <InternalFileSystem.h>
   #if defined(QSPIFLASH)
@@ -83,13 +82,8 @@ static uint32_t _atoi(const char* sp) {
     ArduinoSerialInterface serial_interface;
   #endif
 #elif defined(STM32_PLATFORM)
-  #ifdef ETHERNET_ENABLED
-    #include <helpers/nrf52/SerialEthernetInterface.h>
-    SerialEthernetInterface serial_interface;
-  #else
-    #include <helpers/ArduinoSerialInterface.h>
-    ArduinoSerialInterface serial_interface;
-  #endif
+  #include <helpers/ArduinoSerialInterface.h>
+  ArduinoSerialInterface serial_interface;
 #else
   #error "need to define a serial interface"
 #endif

variants/rak4631/platformio.ini

@@ -65,7 +65,6 @@ build_src_filter = ${rak4631.build_src_filter}
   +<../examples/simple_repeater>
 lib_deps =
   ${rak4631.lib_deps}
-  # renovate: datasource=github-tags depName=RAK13800-W5100S packageName=RAKWireless/RAK13800-W5100S
   https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip
 
 [env:RAK_4631_repeater_bridge_rs232_serial1]
@@ -147,7 +146,6 @@ build_src_filter = ${rak4631.build_src_filter}
   +<../examples/simple_room_server>
 lib_deps =
   ${rak4631.lib_deps}
-  # renovate: datasource=github-tags depName=RAK13800-W5100S packageName=RAKWireless/RAK13800-W5100S
   https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip
 
 [env:RAK_4631_companion_radio_usb]
@@ -197,7 +195,6 @@ build_src_filter = ${rak4631.build_src_filter}
 lib_deps =
   ${rak4631.lib_deps}
   densaugeo/base64 @ ~1.4.0
-  # renovate: datasource=github-tags depName=RAK13800-W5100S packageName=RAKWireless/RAK13800-W5100S
   https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip