Hi,
https://www.ibm.com/support/pages/ibm-i-access-acs-quick-start-guide#7.0
7.0 Uninstall
To remove the application files that were copied to the above locations by the install script, use the platform-specific uninstall script found in the same folder as the install script:
Windows_Application/uninstall_acs.js
Mac_Application/uninstall_acs
Linux_Application/uninstall_acs