You don't enter the whole package name. rpm just uses part of the package name. It could be, in this case, ' citrix-ica-client '. So, ' rpm -e citrix-ica-client ' might remove it.
You could run ' rpm -qa | grep citrix ' and see what package names it returns with ' citrix ' in it. Then, you could remove the package that you want by using the name that rpm uses for the package.