[monitoring-plugins] maintenanc-2.4.0-check_mysql branch removed

[Git Repository]

   Module: monitoring-plugins
   Branch: maintenanc-2.4.0-check_mysql
 Old SHA1: 4886fa3debf79aa2faac9d0180e8ddb4bb1d4aaa

The maintenanc-2.4.0-check_mysql branch has been removed.