vnc: 0.925
graphic: 0.899
socket: 0.878
network: 0.797
device: 0.770
semantic: 0.500
debug: 0.323
other: 0.213
PID: 0.203
performance: 0.183
boot: 0.178
files: 0.140
permissions: 0.131
KVM: 0.005

VNC UNIX sockets are not deleted
Description of problem:
After exiting QEMU a unix VNC socket file is left behind. Upon termination I would expect it to remove the socket file like it does for example with a monitor unix socket.
Steps to reproduce:
```
   rm -f foo.socket
   qemu-system-x86_64 -vnc unix:foo.socket
   # Exit QEMU
   ls foo.socket
   ```