diff --git a/util/tls/tls.go b/util/tls/tls.go
deleted file mode 100644
index a2745c07..00000000
--- a/util/tls/tls.go
+++ /dev/null
@@ -1,78 +0,0 @@
-package tls
-
-import (
-	"bytes"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
-	"crypto/tls"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/pem"
-	"math/big"
-	"net"
-	"time"
-)
-
-func Certificate(host ...string) (tls.Certificate, error) {
-	priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-	if err != nil {
-		return tls.Certificate{}, err
-	}
-
-	notBefore := time.Now()
-	notAfter := notBefore.Add(time.Hour * 24 * 365)
-
-	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
-	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
-	if err != nil {
-		return tls.Certificate{}, err
-	}
-
-	template := x509.Certificate{
-		SerialNumber: serialNumber,
-		Subject: pkix.Name{
-			Organization: []string{"Acme Co"},
-		},
-		NotBefore: notBefore,
-		NotAfter:  notAfter,
-
-		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
-		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
-		BasicConstraintsValid: true,
-	}
-
-	for _, h := range host {
-		if ip := net.ParseIP(h); ip != nil {
-			template.IPAddresses = append(template.IPAddresses, ip)
-		} else {
-			template.DNSNames = append(template.DNSNames, h)
-		}
-	}
-
-	template.IsCA = true
-	template.KeyUsage |= x509.KeyUsageCertSign
-
-	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
-	if err != nil {
-		return tls.Certificate{}, err
-	}
-
-	// create public key
-	certOut := bytes.NewBuffer(nil)
-	if err = pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
-		return tls.Certificate{}, err
-	}
-
-	// create private key
-	keyOut := bytes.NewBuffer(nil)
-	b, err := x509.MarshalECPrivateKey(priv)
-	if err != nil {
-		return tls.Certificate{}, err
-	}
-	if err = pem.Encode(keyOut, &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}); err != nil {
-		return tls.Certificate{}, err
-	}
-
-	return tls.X509KeyPair(certOut.Bytes(), keyOut.Bytes())
-}