$ sudo apt-get remove comet-ms 

Uninstall comet-ms including dependent package

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

$ sudo apt-get remove --auto-remove comet-ms 

Use Purging comet-ms

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

$ sudo apt-get purge comet-ms 

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 comet-ms 

See Also,