fix!: remove digest handling

Closes coop-cloud/organising#379

pkg/client/registry.go

@@ -3,13 +3,10 @@ package client
 import (
 	"context"
 	"fmt"
-	"strings"
 
 	"github.com/containers/image/docker"
 	"github.com/containers/image/types"
 	"github.com/docker/distribution/reference"
-	"github.com/docker/docker/client"
-	"github.com/sirupsen/logrus"
 )
 
 // GetRegistryTags retrieves all tags of an image from a container registry.
@@ -29,29 +26,3 @@ func GetRegistryTags(img reference.Named) ([]string, error) {
 
 	return tags, nil
 }
-
-// GetTagDigest retrieves an image digest from a container registry.
-func GetTagDigest(cl *client.Client, image reference.Named) (string, error) {
-	target := fmt.Sprintf("//%s", reference.Path(image))
-
-	ref, err := docker.ParseReference(target)
-	if err != nil {
-		return "", fmt.Errorf("failed to parse image %s, saw: %s", image, err.Error())
-	}
-
-	ctx := context.Background()
-	img, err := ref.NewImage(ctx, nil)
-	if err != nil {
-		logrus.Debugf("failed to query remote registry for %s, saw: %s", image, err.Error())
-		return "", fmt.Errorf("unable to read digest for %s", image)
-	}
-	defer img.Close()
-
-	digest := img.ConfigInfo().Digest.String()
-
-	if digest == "" {
-		return digest, fmt.Errorf("unable to read digest for %s", image)
-	}
-
-	return strings.Split(digest, ":")[1][:7], nil
-}