If you don't need LSWS anymore, you can always switch to apache without uninstalling LSWS. You can switch to apache through plugin, or through the following command:
/usr/local/lsws/admin/misc/cp_switch_ws.sh apache
If you would like to uninstall LSWS, switch to apache first, then you can uninstall LiteSpeed web server from the plugin.
If you want to remove the plugin completely after uninstallation of LSWS, you can run the following command:
/usr/local/cpanel/whostmgr/docroot/cgi/lsws/lsws_whm_plugin_uninstall.sh