tests: cpp: remove obsolete target

[email protected]/nrf54h20/cpuapp was dropped.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

tests/lib/cpp/cxx/testcase.yaml

@@ -41,7 +41,6 @@ tests:
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54h20dk/nrf54h20/cpurad
-      - [email protected]/nrf54h20/cpuapp
       - nrf9280pdk/nrf9280/cpuapp
       - nrf9280pdk/nrf9280/cpurad
     filter: not CONFIG_HAS_RENESAS_RA_FSP