MAINTAINERS: Abort HAXM maintenance

MAINTAINERS: Abort HAXM maintenance

Abort the maintenance of Guest CPU Cores (HAXM).

* Clean up the maintainer list of X86 HAXM CPUs
* Remove the web page URL and the mailing list
* Change the status to Orphan

Reviewed-by: Hang Yuan <hang.yuan@intel.com>
Signed-off-by: Wenchao Wang <wenchao.wang@intel.com>
Message-Id: <DM6PR11MB40903B55C23D5140E5BEF17687C49@DM6PR11MB4090.namprd11.prod.outlook.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>