Revert "Add API to query role privileges"

Revert "Add API to query role privileges"

Revert submission 13185780-role_query_perms

Reason for revert: Revert to reduce API surface for moving into module.
Reverted Changes:
Ib69fe2749:Add API to query role privileges
If99619e53:Add API to query role privileges

Bug: 165951651
Test: presubmit
Change-Id: I714377bdb2840a96732e9ab6d1dcdaaf3bfe50eb