Remove old org invalid test use cases.
Remove old org invalid test use cases.

boot_flag testing is no longer valid as the counterpart xyz are in place.
org domain /org/openbmc/settings/host0/attr/boot_flags code.

Resolves  openbmc/openbmc-test-automation#1078

Change-Id: Ib48ed7944103f0472fc35b5b8c72c3699c0751b7
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation