Class: com.sybase.djc.ant.UnloadTask (Unload Task) EAServer 6.3 Help
Description This task is used to unload a deployed module. Any server that is running the AutoRefresh scheduled task (in the same installation where the unload task is run) will unload the module.
Configuration Example:
<unload module="ejbjar-example"/>
Task Parameters module

Property: module (Module)
Description The name of the module to be unloaded, e.g. "application-abc", "ejbjar-xyz", "webapp-xyz".