SSH to the server and issue the following commands to remove fantastico :

# rm -rf /var/netenberg/
# rm -rf /usr/local/cpanel/whostmgr/docroot/cgi/fantastico/
# rm -rf /usr/local/cpanel/3rdparty/fantastico*
# rm -rf /usr/local/cpanel/base/frontend/*/fantastico
# rm /usr/local/cpanel/base/frontend/x/cells/fantastico.html
# rm /usr/local/cpanel/whostmgr/docroot/cgi/addon_fantastico.cgi

After removing fantastico from the server, does any of the cPanel accounts show the fantastico icon ?

-You can remove it by doing the following :

From the backend, go to /var/cpanel/registered_cpanelplugins
and delete the file “Fantastico_De_Luxe”

Then, from WHM->Packages->Feature Manager, remove the fantastico check box.