remove unused EventSink
remove unused SubscriptionCurator
remove unused poolManager variable

Originally commented out to fix a bug, but there is no reason to
keep it in the code since we have version control.

/* commented out per 768872
// Revoke all entitlements from the host if no guests were reported.
else if (guestIds == null || guestIds.isEmpty()) {
    poolManager.revokeAllEntitlements(consumer);
}
*/
remove unused OwnerPermissionCurator variable
remove unused OwnerCurator
checkstyle: remove unused imports
fix merge conflict