make platformio.ini even more modular

variants/portduino/platformio.ini

@@ -1,23 +1,3 @@
-; The Portduino based sim environment on top of any host OS, all hardware will be simulated
-[portduino_base]
-build_src_filter = 
-  ${env.build_src_filter} 
-  -<platform/esp32/> 
-  -<nimble/> 
-  -<platform/nrf52/> 
-  -<platform/stm32wl/> 
-  -<platform/rp2040>
-  -<mesh/http/> 
-  -<modules/esp32>
-  -<modules/Telemetry>
-  +<../variants/portduino>
-lib_deps =
-  ${env.lib_deps}
-  ${networking_base.lib_deps}
-  rweather/Crypto
-  https://github.com/meshtastic/RadioLib.git#5582ac30578ff3f53f20630a00b2a8a4b8f92c74
-build_flags = ${arduino_base.build_flags} -Isrc/platform/portduino
-
 [env:native]
 platform = https://github.com/meshtastic/platform-native.git 
 build_flags = ${portduino_base.build_flags} -O0 -I variants/portduino