footprint: Remove bt_hap_ha for nrf52840dk

Remove the tracking of that sample as it does not build due
to missing BT ISO support.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

scripts/footprint/plan.txt

@@ -18,7 +18,6 @@ bt_beacon,default,nrf52840dk_nrf52840,samples/bluetooth/beacon,
 bt_peripheral,default,nrf52840dk_nrf52840,samples/bluetooth/peripheral,
 bt_central_hr,default,nrf52840dk_nrf52840,samples/bluetooth/central_hr,
 bt_mesh_demo,default,bbc_microbit,samples/bluetooth/mesh_demo,
-bt_hap_ha,default,nrf52840dk_nrf52840,samples/bluetooth/hap_ha,
 bt_hap_ha,default,nrf5340dk_nrf5340_cpuapp,samples/bluetooth/hap_ha,
 bt_hci_rpmsg,default,nrf5340dk_nrf5340_cpunet,samples/bluetooth/hci_rpmsg,
 bt_hci_rpmsg,iso-broadcast,nrf5340dk_nrf5340_cpunet,samples/bluetooth/hci_rpmsg,-DCONF_FILE=nrf5340_cpunet_iso_broadcast.conf