undeprecate references

On-behalf-of: @SAP christoph.mewes@sap.com

Author: xrstf

internal/sync/syncer_related.go

@@ -250,7 +250,6 @@ func resolveRelatedResourceObjects(relatedOrigin, relatedDest syncSide, relRes s
 
 func resolveRelatedResourceOriginNamespaces(relatedOrigin, relatedDest syncSide, origin syncagentv1alpha1.RelatedResourceOrigin, spec syncagentv1alpha1.RelatedResourceObjectSpec) (map[string]string, error) {
 	switch {
-	//nolint:staticcheck // .Reference is deprecated, but we still support it for now.
 	case spec.Reference != nil:
 		originNamespace, err := resolveObjectReference(relatedOrigin.object, *spec.Reference) //nolint:staticcheck
 		if err != nil {

sdk/apis/syncagent/v1alpha1/published_resource.go

@@ -217,8 +217,6 @@ type RelatedResourceObjectSpec struct {
 	Selector *RelatedResourceObjectSelector `json:"selector,omitempty"`
 	// Reference points to a field inside the main object. This reference is
 	// evaluated on both source and destination sides to find the related object.
-	//
-	// Deprecated: Use Go templates instead.
 	Reference *RelatedResourceObjectReference `json:"reference,omitempty"`
 	// Template is a Go templated string that can make use of variables to
 	// construct the resulting string.