Remove unused adoption strings

Author: Nicholas Thomson

apis/core/v1alpha1/types.go

@@ -90,10 +90,3 @@ type PartialObjectMeta struct {
 	// +patchStrategy=merge
 	OwnerReferences []metav1.OwnerReference `json:"ownerReferences,omitempty" patchStrategy:"merge" patchMergeKey:"uid" protobuf:"bytes,6,rep,name=ownerReferences"`
 }
-
-type AdoptionStatus string
-
-const (
-	AdoptionStatus_Adopted AdoptionStatus = "Adopted"
-	AdoptionStatus_Error   AdoptionStatus = "Error"
-)