refactor: drop ACR support for now

pkg/oci/authn.go

@@ -2,7 +2,6 @@ package oci
 
 import (
 	ecr "github.com/awslabs/amazon-ecr-credential-helper/ecr-login"
-	acr "github.com/chrismellard/docker-credential-acr-env/pkg/credhelper"
 	"github.com/google/go-containerregistry/pkg/authn"
 	"github.com/google/go-containerregistry/pkg/v1/google"
 	"github.com/google/go-containerregistry/pkg/v1/remote"
@@ -13,11 +12,10 @@ func MultiKeychainOption() remote.Option {
 }
 
 func MultiKeychainAll() authn.Keychain {
-	// Create a multi-keychain that will use the default Docker, Google, ECR or ACR keychain
+	// Create a multi-keychain that will use the default Docker, Google, or ECR keychain
 	return authn.NewMultiKeychain(
 		authn.DefaultKeychain,
 		google.Keychain,
 		authn.NewKeychainFromHelper(ecr.NewECRHelper()),
-		authn.NewKeychainFromHelper(acr.NewACRCredentialsHelper()),
 	)
 }