$ sudo apt-get remove libfloat-coq 

Uninstall libfloat-coq including dependent package

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

$ sudo apt-get remove --auto-remove libfloat-coq 

Use Purging libfloat-coq

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

$ sudo apt-get purge libfloat-coq 

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 libfloat-coq 

See Also,