Remove unknown provisioner WARNning and leave TODO

authority/provisioner/provisioner.go

@@ -3,7 +3,6 @@ package provisioner
 import (
 	"crypto/x509"
 	"encoding/json"
-	"log"
 	"net/url"
 	"strings"
 
@@ -155,11 +154,11 @@ func (l *List) UnmarshalJSON(data []byte) error {
 			// compiled with a version of smallstep/certificates that does not
 			// support a specific provisioner type. If we don't skip unknown
 			// provisioners, a client encountering an unknown provisioner will
-			// break. Rather than break the client, we skip the provisioner but
+			// break. Rather than break the client, we skip the provisioner.
+			// TODO: accept a pluggable logger (depending on client) that can
 			// warn the user that an unknown provisioner was found and suggest
 			// that the user update their client's dependency on
 			// step/certificates and recompile.
-			log.Printf("[WARN] Unknown provisioner of type '%s' found. Please update your client.", typ.Type)
 			continue
 		}
 		if err := json.Unmarshal(data, p); err != nil {