qemu_process: spice: don't release used port

The port is stored in graphics configuration and it will
also get released in qemuProcessStop in case of error.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1397440Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

src/qemu/qemu_process.c

@@ -3693,7 +3693,6 @@ qemuProcessSPICEAllocatePorts(virQEMUDriverPtr driver,
     ret = 0;
 
  cleanup:
-    virPortAllocatorRelease(driver->remotePorts, port);
     virObjectUnref(cfg);
     return ret;
 }