remove dataimage finalizer if bmh is missing

Signed-off-by: Himanshu Roy <hroy@redhat.com>

controllers/metal3.io/dataimage_controller.go

@@ -111,7 +111,13 @@ func (r *DataImageReconciler) Reconcile(ctx context.Context, req ctrl.Request) (
 	if err := r.Get(ctx, req.NamespacedName, bmh); err != nil {
 		// There might not be any BareMetalHost for the DataImage
 		if k8serrors.IsNotFound(err) {
-			reqLogger.Info("bareMetalHost not found for the dataImage")
+			reqLogger.Info("bareMetalHost not found for the dataImage, remove finalizer if it exists")
+			di.Finalizers = utils.FilterStringFromList(
+				di.Finalizers, metal3api.DataImageFinalizer)
+
+			if err := r.Update(ctx, di); err != nil {
+				return ctrl.Result{Requeue: true, RequeueAfter: dataImageRetryDelay}, fmt.Errorf("failed to update resource after remove finalizer, %w", err)
+			}
 			return ctrl.Result{}, nil
 		}