You can uninstall a package silently by using a response file.
Perform the following steps to uninstall a software package in silent mode:
For more information about uninstalling a package silently by using a response file, go to http://pic.dhe.ibm.com/infocenter/install/v1r6/topic/com.ibm.silentinstall12.doc/topics/t_silent_response_file_uninstall.html.