How to uninstall clamav-data from Ubuntu
To uninstall just clamav-data package itself from Ubuntu execute on terminal:
sudo apt-get remove clamav-data
Uninstall clamav-data and it's dependent packages
To uninstall the clamav-data package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove clamav-data
If you also want to delete configuration and/or data files of clamav-data from Ubuntu then this will work:
sudo apt-get purge clamav-data
To delete configuration and/or data files of clamav-data and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge clamav-data
clamav-data package information
clamav data files
This package contains data files for clamav and was automatically generated by clamav-getfiles from the identically named package. If you have downloaded this package from an "official" Debian release, the databases contained here are most certainly outdated. Please check if you can use clamav-freshclam to do automatic updates, or use clamav-getfiles to generate your own clamav-data packages. If you can't obtain your own current database files, you can apt more recent database files from the Debian-volatile archive. See http://volatile.debian.net for details.
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.