This KB explains how to uninstall a UIM package (not a probe) from the UIM Robot.
UIM: Any version
It is possible to uninstall a package from UIM Robot via the controller callback 'inst_pkg_remove'.
1. In IM, select the controller probe and press CTRL+P
2. Select 'inst_pkg_remove' from the probe commandset dropdown.
3. Input the package name which you want to uninstall.
4. Execute (Green button)
Note: To identify the actual package name you want o uninstall use the inst_list_summary callback first: