$ sudo apt-get remove gss-ntlmssp 

Uninstall gss-ntlmssp including dependent package

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

$ sudo apt-get remove --auto-remove gss-ntlmssp 

Use Purging gss-ntlmssp

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

$ sudo apt-get purge gss-ntlmssp 

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 gss-ntlmssp 

See Also,