Revert "[nrf noup] boot/zephyr: nrf54h20dk board support"

This reverts commit c872f6a.

Signed-off-by: Bjarki Arge Andreasen <[email protected]>

Author: bjarki-andreasen

boot/zephyr/boards/nrf54h20dk_nrf54h20_cpuapp_iron.conf

@@ -6,9 +6,6 @@
 # Ensure that the SPI NOR driver is disabled by default
 CONFIG_SPI_NOR=n
 
-# TODO: below are not yet supported and need fixing
-CONFIG_FPROTECT=n
-
 CONFIG_BOOT_WATCHDOG_FEED=n
 
 # Power domains forced on by default on boot, no need