To uninstall ClamAV, use following steps,
/bin/rm -Rfv /usr/bin/clam*
/bin/rm -Rfv /usr/sbin/clam*
/bin/rm -Rfv /usr/lib/libclam*
/bin/rm -Rfv /usr/share/clam*
/bin/rm -Rfv /usr/include/clam*
/bin/rm -Rfv /usr/bin/freshclam*
/bin/rm -Rfv /usr/etc/clamav*
/bin/rm -Rfv /usr/local/bin/clam*
/bin/rm -Rfv /usr/local/sbin/clam*
/bin/rm -Rfv /usr/local/lib/libclam*
/bin/rm -Rfv /usr/local/share/clam*
/bin/rm -Rfv /usr/local/include/clam*
/bin/rm -Rfv /usr/local/bin/freshclam*
/bin/rm -Rfv /usr/local/etc/clamav*
