[PATCH] powerpc/PCI hotplug: remove remove_bus_device()

The function rpaphp_eeh_remove_bus_device() is a dupe of
eeh_remove_bus_device(). Remove it.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Acked-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>