samples: radio_test: remove special handling of nrf21540ek on nrf5340

Direct handling of pin forwarding for nrf21540ek on the nrf5340 in
radio_test sample is not necessary and is removed. The pin forwarding
on the nrf5340 is handled by the shield code.

Signed-off-by: Andrzej Kuros <[email protected]>

Author: ankuns

samples/peripheral/radio_test/sysbuild.cmake

@@ -27,13 +27,6 @@ if(SB_CONFIG_SOC_NRF5340_CPUNET AND NOT SB_CONFIG_BOARD_NRF7002DK)
   set_property(GLOBAL APPEND PROPERTY PM_CPUAPP_IMAGES "remote_shell")
   set_property(GLOBAL PROPERTY DOMAIN_APP_CPUAPP "remote_shell")
   set(CPUAPP_PM_DOMAIN_DYNAMIC_PARTITION remote_shell CACHE INTERNAL "")
-
-  string(REPLACE " " ";" shield_list "${SHIELD}")
-  if("nrf21540ek" IN_LIST shield_list)
-    add_overlay_dts(
-	remote_shell
-      ${CMAKE_CURRENT_LIST_DIR}/sysbuild/remote_shell/nrf21540ek.overlay)
-  endif()
 endif()
 
 set_property(GLOBAL PROPERTY PM_DOMAINS ${PM_DOMAINS})