distribution: show image schema deprecation on all registries

When we added this deprecation warning, some registries had not yet
moved away from the deprecated specification, so we made the warning
conditional for pulling from Docker Hub.

That condition was added in 647dfe9,
which is over 4 Years ago, which should be time enough for images
and registries to have moved to current specifications.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

distribution/pull_v2.go

@@ -436,13 +436,9 @@ func (p *puller) pullTag(ctx context.Context, ref reference.Named, platform *oci
 
 	switch v := manifest.(type) {
 	case *schema1.SignedManifest:
-		// give registries time to upgrade to schema2 and only warn if we know a registry has been upgraded long time ago
-		// TODO: condition to be removed
-		if reference.Domain(ref) == "docker.io" {
-			msg := fmt.Sprintf("[DEPRECATION NOTICE] Docker Image Format v1, and Docker Image manifest version 2, schema 1 support will be removed in an upcoming release. Suggest the author of %s to upgrade the image to the OCI Format, or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/", ref)
-			log.G(ctx).Warn(msg)
-			progress.Message(p.config.ProgressOutput, "", msg)
-		}
+		msg := fmt.Sprintf("[DEPRECATION NOTICE] Docker Image Format v1, and Docker Image manifest version 2, schema 1 support will be removed in an upcoming release. Suggest the author of %s to upgrade the image to the OCI Format, or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/", ref)
+		log.G(ctx).Warn(msg)
+		progress.Message(p.config.ProgressOutput, "", msg)
 
 		id, manifestDigest, err = p.pullSchema1(ctx, ref, v, platform)
 		if err != nil {