The program 'eclipse' is currently not installed. You can install it by typing:
sudo apt-get install eclipse-platform
E mais uma coisa, para desinstalar um pacote, use:
sudo apt-get remove package_name
ou
sudo apt-get purge package_name
Veja man apt-get
para mais informações:
autoremove is used to remove packages that were automatically installed to satisfy dependencies for other packages and are now no longer needed.