$ sudo apt-get remove dot2tex 

Uninstall dot2tex including dependent package

If you would like to remove dot2tex and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove dot2tex 

Use Purging dot2tex

If you use with purge options to dot2tex package all the configuration and dependent packages will be removed.

$ sudo apt-get purge dot2tex 

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 dot2tex 

See Also,