Get rid of unused variable warning in drivers/pci/hotplug/pci_hotplug_core.c

Commit 5a7ad7f044941316dc98eda2a087a12a7a50649d removed all uses of
'retval', but didn't remove the variable itself.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 file changed