$ sudo apt-get remove qemu-slof 

Uninstall qemu-slof including dependent package

If you would like to remove qemu-slof and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove qemu-slof 

Use Purging qemu-slof

If you use with purge options to qemu-slof package all the configuration and dependent packages will be removed.

$ sudo apt-get purge qemu-slof 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove qemu-slof 

See Also,