Merge branch '5884-double-translation' into 'develop'

Remove double translation (#5884)

Closes #5884

See merge request ispconfig/ispconfig3!1304

Author: Marius Burkard

interface/web/admin/lib/lang/de_system_config.lng

@@ -74,10 +74,6 @@ $wb['session_allow_endless_txt'] = '"Eingeloggt bleiben" aktivieren';
 $wb['No'] = 'Nein';
 $wb['min_password_length_txt'] = 'Minimale Passwortlänge';
 $wb['min_password_strength_txt'] = 'Minimale Passwortstärke';
-$wb['ssh_authentication_txt'] = 'Allowed SSH authentication';
-$wb['ssh_authentication_password_key'] = 'Password & Key';
-$wb['ssh_authentication_password'] = 'Password';
-$wb['ssh_authentication_key'] = 'Key';
 $wb['ssh_authentication_txt'] = 'Erlaubte SSH Authentifizierung';
 $wb['ssh_authentication_password_key'] = 'Passwort & Schlüssel';
 $wb['ssh_authentication_password'] = 'Passwort';