registry/client: remove uses of APIEndpoint.TrimHostName

This field was added in https://github.com/moby/moby/commit/19515a7ad859b28c474d81e756ac245afcd968e3,
but looks to be always set for endpoints used, so we can trim remote names
unconditionally.

This option was added for possible future expansion, allowing registry-
mirrors to get the full reference of the image (including domain-name),
for them to host a mirror for multiple upstreams on the same registry.

That approach will unlikely be implemented, and containerd has a different
approach for this, where the reference to the original registry is passed
through a query parameter instead.

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

cli/registry/client/endpoint.go

@@ -22,12 +22,7 @@ type repositoryEndpoint struct {
 
 // Name returns the repository name
 func (r repositoryEndpoint) Name() string {
-	repoName := r.info.Name.Name()
-	// If endpoint does not support CanonicalName, use the RemoteName instead
-	if r.endpoint.TrimHostname {
-		repoName = reference.Path(r.info.Name)
-	}
-	return repoName
+	return reference.Path(r.info.Name)
 }
 
 // BaseURL returns the endpoint url