$ sudo apt-get remove photofloat 

Uninstall photofloat including dependent package

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

$ sudo apt-get remove --auto-remove photofloat 

Use Purging photofloat

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

$ sudo apt-get purge photofloat 

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 photofloat 

See Also,