Remove unneeded metadata from CRD

Author: bswartz

client/config/crd/populator.storage.k8s.io_volumepopulators.yaml

@@ -32,8 +32,6 @@ spec:
           kind:
             description: 'Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
             type: string
-          metadata:
-            type: object
           sourceKind:
             description: Kind of the data source this populator supports
             properties: