diff --git a/transport/tlscommon/versions_default.go b/transport/tlscommon/versions_default.go
index 7ea64a7..35afbc2 100644
--- a/transport/tlscommon/versions_default.go
+++ b/transport/tlscommon/versions_default.go
@@ -15,8 +15,6 @@
 // specific language governing permissions and limitations
 // under the License.
 
-//go:build go1.13
-
 package tlscommon
 
 import (
diff --git a/transport/tlscommon/versions_legacy.go b/transport/tlscommon/versions_legacy.go
deleted file mode 100644
index 6c452f8..0000000
--- a/transport/tlscommon/versions_legacy.go
+++ /dev/null
@@ -1,62 +0,0 @@
-// Licensed to Elasticsearch B.V. under one or more contributor
-// license agreements. See the NOTICE file distributed with
-// this work for additional information regarding copyright
-// ownership. Elasticsearch B.V. licenses this file to you under
-// the Apache License, Version 2.0 (the "License"); you may
-// not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing,
-// software distributed under the License is distributed on an
-// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-// KIND, either express or implied.  See the License for the
-// specific language governing permissions and limitations
-// under the License.
-
-//go:build !go1.13
-
-package tlscommon
-
-import "crypto/tls"
-
-const (
-	TLSVersion10 TLSVersion = tls.VersionTLS10
-	TLSVersion11 TLSVersion = tls.VersionTLS11
-	TLSVersion12 TLSVersion = tls.VersionTLS12
-
-	// TLSVersionMin is the min TLS version supported.
-	TLSVersionMin = TLSVersion10
-
-	// TLSVersionMax is the max TLS version supported.
-	TLSVersionMax = TLSVersion12
-
-	// TLSVersionDefaultMin is the minimal default TLS version that is
-	// enabled by default. TLSVersionDefaultMin is >= TLSVersionMin
-	TLSVersionDefaultMin = TLSVersion10
-
-	// TLSVersionDefaultMax is the max default TLS version that
-	// is enabled by default.
-	TLSVersionDefaultMax = TLSVersionMax
-)
-
-// TLSDefaultVersions list of versions of TLS we should support.
-var TLSDefaultVersions = []TLSVersion{
-	TLSVersion10,
-	TLSVersion11,
-	TLSVersion12,
-}
-
-var tlsProtocolVersions = map[string]TLSVersion{
-	"TLSv1":   TLSVersion10,
-	"TLSv1.0": TLSVersion10,
-	"TLSv1.1": TLSVersion11,
-	"TLSv1.2": TLSVersion12,
-}
-
-var tlsProtocolVersionsInverse = map[TLSVersion]string{
-	TLSVersion10: "TLSv1.0",
-	TLSVersion11: "TLSv1.1",
-	TLSVersion12: "TLSv1.2",
-}