Update vendor

vendor/github.com/moby/buildkit/session/auth/authprovider/authprovider.go

@@ -1,53 +0,0 @@
-package authprovider
-
-import (
-	"context"
-	"io"
-	"sync"
-
-	"github.com/docker/cli/cli/config"
-	"github.com/docker/cli/cli/config/configfile"
-	"github.com/moby/buildkit/session"
-	"github.com/moby/buildkit/session/auth"
-	"google.golang.org/grpc"
-)
-
-func NewDockerAuthProvider(stderr io.Writer) session.Attachable {
-	return &authProvider{
-		config: config.LoadDefaultConfigFile(stderr),
-	}
-}
-
-type authProvider struct {
-	config *configfile.ConfigFile
-
-	// The need for this mutex is not well understood.
-	// Without it, the docker cli on OS X hangs when
-	// reading credentials from docker-credential-osxkeychain.
-	// See issue https://github.com/docker/cli/issues/1862
-	mu sync.Mutex
-}
-
-func (ap *authProvider) Register(server *grpc.Server) {
-	auth.RegisterAuthServer(server, ap)
-}
-
-func (ap *authProvider) Credentials(ctx context.Context, req *auth.CredentialsRequest) (*auth.CredentialsResponse, error) {
-	ap.mu.Lock()
-	defer ap.mu.Unlock()
-	if req.Host == "registry-1.docker.io" {
-		req.Host = "https://index.docker.io/v1/"
-	}
-	ac, err := ap.config.GetAuthConfig(req.Host)
-	if err != nil {
-		return nil, err
-	}
-	res := &auth.CredentialsResponse{}
-	if ac.IdentityToken != "" {
-		res.Secret = ac.IdentityToken
-	} else {
-		res.Username = ac.Username
-		res.Secret = ac.Password
-	}
-	return res, nil
-}