Revert "samples: mgmt: hawkbit: force BOOT_MAX_IMG_SECTORS for stm32h573i_dk"

This reverts commit 5700ffe.
Not required anymore as the CONFIG_BOOT_MAX_IMG_SECTORS
is fixed by the mcuboot at 4096.

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

samples/subsys/mgmt/hawkbit/sample.yaml

@@ -17,8 +17,6 @@ tests:
   sample.net.hawkbit.default: {}
   sample.net.hawkbit.sysbuild:
     sysbuild: true
-    extra_args:
-      - platform:stm32h573i_dk/stm32h573xx:mcuboot_CONFIG_BOOT_MAX_IMG_SECTORS=128
   sample.net.hawkbit.manual:
     extra_configs:
       - CONFIG_HAWKBIT_MANUAL=y