[postfixadmin/postfixadmin] 6a53b1: Drop duplicate db_delete() call from DkimHandler

[Christian B. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/postfixadmin/postfixadmin
  Commit: 6a53b1ab882446dda7111d63664afb06f4adf9af
      https://github.com/postfixadmin/postfixadmin/commit/6a53b1ab882446dda7111d63664afb06f4adf9af
  Author: Christian Boltz <pos...@cb...>
  Date:   2022-07-18 (Mon, 18 Jul 2022)

  Changed paths:
    M model/DkimHandler.php
    M model/DkimsigningHandler.php

  Log Message:
  -----------
  Drop duplicate db_delete() call from DkimHandler

... and DkimsigningHandler

The hardcoded name is the same as $this->db_table, which effectively
means running the same query twice. One of them is enough.