Merge pull request #2432 from recrof/kiss-radio-everywhere

kiss radio: added stm32 support + envs in platformio.ini

variants/heltec_v3/platformio.ini

@@ -371,9 +371,5 @@ lib_deps =
 
 [env:Heltec_v3_kiss_modem]
 extends = Heltec_lora32_v3
-build_flags =
-  ${Heltec_lora32_v3.build_flags}
 build_src_filter = ${Heltec_lora32_v3.build_src_filter}
   +<../examples/kiss_modem/>
-lib_deps =
-  ${Heltec_lora32_v3.lib_deps}