samples: 802154_phy_test: Remove nrf54h20dk support

Remove nrf54h20dk/nrf54h20/cpurad platform support for
802154_phy_test sample.yaml configuration
Ref: KRKNWK-20094

Signed-off-by: Dawid Przybylo <dawid.przybylo@nordicsemi.no>

Author: dawidprzybylo

samples/peripheral/802154_phy_test/sample.yaml

@@ -11,14 +11,12 @@ tests:
       - nrf21540dk/nrf52840
       - nrf5340dk/nrf5340/cpunet
       - nrf54l15dk/nrf54l15/cpuapp
-      - nrf54h20dk/nrf54h20/cpurad
     platform_allow:
       - nrf52833dk/nrf52833
       - nrf52840dk/nrf52840
       - nrf21540dk/nrf52840
       - nrf5340dk/nrf5340/cpunet
       - nrf54l15dk/nrf54l15/cpuapp
-      - nrf54h20dk/nrf54h20/cpurad
     tags:
       - ci_build
       - ci_rs_build