cli/registry: client.iterateEndpoints: remove check for APIVersion1

registryService.LookupPullEndpoints uses lookupV2Endpoints
https://github.com/moby/moby/blob/v24.0.5/registry/service.go#L137-L142

which, as the name indicates, only returns V2 endpoints;
https://github.com/moby/moby/blob/v24.0.5/registry/service_v2.go#L10-L80

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 22b4bab)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/registry/client/fetcher.go

@@ -243,11 +243,6 @@ func (c *client) iterateEndpoints(ctx context.Context, namedRef reference.Named,
 
 	confirmedTLSRegistries := make(map[string]bool)
 	for _, endpoint := range endpoints {
-		if endpoint.Version == registry.APIVersion1 {
-			logrus.Debugf("skipping v1 endpoint %s", endpoint.URL)
-			continue
-		}
-
 		if endpoint.URL.Scheme != "https" {
 			if _, confirmedTLS := confirmedTLSRegistries[endpoint.URL.Host]; confirmedTLS {
 				logrus.Debugf("skipping non-TLS endpoint %s for host/port that appears to use TLS", endpoint.URL)