remove WebVirtMgr

yes, it's lightweight. I have tried it though and I don't think
the software is awesome.

the last commit was years ago and there are countless typos
and other errors in the code.

can't recommend at this time.

README.md

@@ -247,7 +247,6 @@
 * Revision Control: see [awesome-selfhosted#project-management](https://github.com/Kickball/awesome-selfhosted#project-management)
 * Virtualization
   * [OpenVZ Web Panel](https://github.com/sibprogrammer/owp) - Web panel to control OpenVZ virtual machines.
-  * [WebVirtMgr](https://retspen.github.io) - libvirt-based Web interface for managing virtual machines.
 * Server
   * [Ajenti](http://ajenti.org/) - Control panel for Linux and BSD.
   * [Cockpit](http://cockpit-project.org/) - New multi-server web interface for Linux servers written in C.