$ sudo apt-get remove ldp-docbook-xsl 

Uninstall ldp-docbook-xsl including dependent package

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

$ sudo apt-get remove --auto-remove ldp-docbook-xsl 

Use Purging ldp-docbook-xsl

If you use with purge options to ldp-docbook-xsl package all the configuration and dependent packages will be removed.

$ sudo apt-get purge ldp-docbook-xsl 

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 ldp-docbook-xsl 

See Also,