Every service SAP is associated, by default, with the appropriate ingress policy (policy-id 1). You can replace the default policy with a customer-configured policy, but you cannot entirely remove the policy from the SAP configuration. When you remove a non-default service ingress policy, the association reverts to the default policy-id 1.
A QoS policy cannot be deleted until it is removed from all SAPs where they are applied.
A:ALA-7>config>qos# no sap-ingress 100
MINOR: CLI SAP ingress policy "100" cannot be removed because it is in use.
A:ALA-7>config>qos#