Remove legacy auto gen file that is no longer in use

[dhaiducek]

Cherry-pick of:

• remove legacy auto gen file that is no longer in use stolostron/multicloud-operators-placementrule#119

[dhaiducek]

This should hopefully fix GRC packages trying to pull in the PlacementRule:

# open-cluster-management.io/multicloud-operators-subscription/pkg/apis/apps/placementrule/v1
Error: /go/pkg/mod/open-cluster-management.io/multicloud-operators-subscription@v0.5.0/pkg/apis/apps/placementrule/v1/zz_generated.openapi.go:34:3: cannot use "github.com/go-openapi/spec".Schema{...} (type "github.com/go-openapi/spec".Schema) as type "k8s.io/kube-openapi/pkg/validation/spec".Schema in field value
Error: /go/pkg/mod/open-cluster-management.io/multicloud-operators-subscription@v0.5.0/pkg/apis/apps/placementrule/v1/zz_generated.openapi.go:55:8: cannot use ref("k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta") (type "k8s.io/kube-openapi/pkg/validation/spec".Ref) as type "github.com/go-openapi/spec".Ref in field value
Error: /go/pkg/mod/open-cluster-management.io/multicloud-operators-subscription@v0.5.0/pkg/apis/apps/placementrule/v1/zz_generated.openapi.go:60:8: cannot use ref("open-cluster-management.io/multicloud-operators-subscription/pkg/api...) (type "k8s.io/kube-openapi/pkg/validation/spec".Ref) as type "github.com/go-openapi/spec".Ref in field value
Error: /go/pkg/mod/open-cluster-management.io/multicloud-operators-subscription@v0.5.0/pkg/apis/apps/placementrule/v1/zz_generated.openapi.go:65:8: cannot use ref("open-cluster-management.io/multicloud-operators-subscription/pkg/api...) (type "k8s.io/kube-openapi/pkg/validation/spec".Ref) as type "github.com/go-openapi/spec".Ref in field value

https://github.com/open-cluster-management-io/governance-policy-spec-sync/runs/4587483893?check_suite_focus=true#step:8:118-122

[mikeshng]

fossa scan fix PR #61

[dhaiducek]

Would someone please re-run these tests? The failure was intermittent as far as I can tell.

[mikeshng]

/lgtm

[openshift-ci]

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[mikeshng]

Sorry about that we will try to fix the test asap. We think it has to do with GitHub actions performance related. For now lets do just do a few retries and it should go thru.