Remove SetImageDefaults that overrode CSV image SHAs

Cherry-picked from: b1bbbb7
#1404

Author: gcs278

pkg/operator/controller/gatewayclass/controller.go

@@ -84,15 +84,6 @@ const (
 	// 1. Sail Library mode: Uninstall Istio if this is the last GatewayClass, then remove finalizer
 	// 2. Downgrade to OLM: Clean up Sail Library status and finalizer (then OLM takes over Istio)
 	sailLibraryFinalizer = "openshift.io/ingress-operator-sail-finalizer"
-
-	// Image configuration for Sail Library installations.
-	// These are only used for defaulting when CSV image annotations are missing,
-	// which should not happen in production clusters with proper OSSM release branches.
-	ossmImageRegistry = "registry.redhat.io/openshift-service-mesh"
-	istioImageIstiod  = "istio-pilot-rhel9"
-	istioImageProxy   = "istio-proxyv2-rhel9"
-	istioImageCNI     = "istio-cni-rhel9"
-	istioImageZTunnel = "istio-ztunnel-rhel9"
 )
 
 var log = logf.Logger.WithName(controllerName)
@@ -168,19 +159,6 @@ func NewUnmanaged(mgr manager.Manager, config Config) (controller.Controller, er
 			return nil, err
 		}
 	} else {
-		// TODO: Remove this when we switch to an OSSM release branch with proper CSV image annotations.
-		//       The main branch of sail-operator does not maintain image annotations in the CSV,
-		//       causing Istio to fall back to upstream container images. This explicit configuration
-		//       ensures Red Hat images are used until the release branch has the annotations properly maintained.
-		err := install.SetImageDefaults(resources.FS, ossmImageRegistry, install.ImageNames{
-			Istiod:  istioImageIstiod,
-			Proxy:   istioImageProxy,
-			CNI:     istioImageCNI,
-			ZTunnel: istioImageZTunnel,
-		})
-		if err != nil {
-			return nil, fmt.Errorf("failed to set image defaults: %w", err)
-		}
 		// Start the Sail Library's background reconciliation loop (runs in a goroutine).
 		// Returns a notification channel that signals when library reconciliation completes,
 		// allowing us to update GatewayClass status conditions accordingly.