How Do I Remove Quartz from JBossAS 4.x
Assuming the default server configuration ($JBOSS_HOME/server/default) is used, remove server/default/deploy/quartz-ra.rar. There are no direct dependencies on quartz therefore JBoss will start after doing this (provided you have no applications using Quartz).
In server/default/lib you will also find quartz-all-1.5.2.jar. You may remove this as well.