virpci: Drop unused @ret in virPCIDeviceListDel

So after 00dc991c the function is one line long and the
line is declaring a variable which is never used in fact. Replace
it with actual free() call instead of autofree.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/util/virpci.c

@@ -2003,7 +2003,7 @@ void
 virPCIDeviceListDel(virPCIDeviceListPtr list,
                     virPCIDevicePtr dev)
 {
-    VIR_AUTOPTR(virPCIDevice) ret = virPCIDeviceListSteal(list, dev);
+    virPCIDeviceFree(virPCIDeviceListSteal(list, dev));
 }
 
 int