How to uninstall lsb-rpm from Ubuntu
To uninstall just lsb-rpm package itself from Ubuntu execute on terminal:
sudo apt-get remove lsb-rpm
Uninstall lsb-rpm and it's dependent packages
To uninstall the lsb-rpm package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove lsb-rpm
If you also want to delete configuration and/or data files of lsb-rpm from Ubuntu then this will work:
sudo apt-get purge lsb-rpm
To delete configuration and/or data files of lsb-rpm and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge lsb-rpm
lsb-rpm package information
RPM Package Manager for LSB package building
The RPM Package Manager (RPM) is a command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating computer software packages. This is a version of rpm built to create rpm v3 packages as used in the Linux Standards Base. You should need this package only if you are developing LSB packages; you do not need it to install or use LSB packages on Debian. The binary is linked statically so it should be possible to use it in the restricted lsbdev environment.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.