$ sudo apt-get remove ipython3 

Uninstall ipython3 including dependent package

If you would like to remove ipython3 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove ipython3 

Use Purging ipython3

If you use with purge options to ipython3 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge ipython3 

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 ipython3 

See Also,