change(openvpn): Openvpn 2.4 no longer supported

internal/provider/utils/cipher.go

@@ -2,25 +2,15 @@ package utils
 
 import (
 	"strings"
-
-	"github.com/qdm12/gluetun/internal/constants/openvpn"
 )
 
-func CipherLines(ciphers []string, version string) (lines []string) {
+func CipherLines(ciphers []string) (lines []string) {
 	if len(ciphers) == 0 {
 		return nil
 	}
 
-	switch version {
-	case openvpn.Openvpn24:
-		return []string{
-			"cipher " + ciphers[0],
-			"ncp-ciphers " + strings.Join(ciphers, ":"),
-		}
-	default: // 2.5 and above
-		return []string{
-			"data-ciphers-fallback " + ciphers[0],
-			"data-ciphers " + strings.Join(ciphers, ":"),
-		}
+	return []string{
+		"data-ciphers-fallback " + ciphers[0],
+		"data-ciphers " + strings.Join(ciphers, ":"),
 	}
 }