Only change CPMember

Author: gareth-johnston

protocol-definitions/custom/Custom.yaml

@@ -828,10 +828,6 @@ customTypes:
         type: Map_EndpointQualifier_Address
         nullable: false
         since: 2.0.1
-      - name: autoStepDownWhenLeader
-        type: boolean
-        nullable: false
-        since: 2.9
   - name: EndpointQualifier
     returnWithFactory: true
     since: 2.0.1