fix lint

lib/srv/alpnproxy/local_proxy_test.go

@@ -21,11 +21,8 @@ package alpnproxy
 import (
 	"bytes"
 	"context"
-	"crypto/sha256"
 	"crypto/tls"
 	"crypto/x509"
-	"encoding/hex"
-	"errors"
 	"io"
 	"net"
 	"net/http"
@@ -143,7 +140,7 @@ func TestHandleAWSAccessSigVerification(t *testing.T) {
 
 			require.Error(t, err)
 			var serr *awshttp.ResponseError
-			require.True(t, errors.As(err, &serr))
+			require.ErrorAs(t, err, &serr)
 			require.Equal(t, tc.wantStatus, serr.HTTPStatusCode())
 		})
 	}
@@ -767,12 +764,6 @@ func TestGetCertsForConn(t *testing.T) {
 	}
 }
 
-func hashPayload(payload []byte) string {
-	hasher := sha256.New()
-	io.Copy(hasher, bytes.NewReader(payload))
-	return hex.EncodeToString(hasher.Sum(nil))
-}
-
 type addUserAgentSignedHeaderMiddleware struct {
 }