edac/85xx: Remove mpc85xx_pci_err_remove

Remove mpc85xx_pci_err_remove(...) which is obsolete, this removes the
compiler warning which can be seen when building the driver either
statically or as a module.

Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>
Link: https://lkml.kernel.org/r/20131112161901.GA15637@jtlinux


Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Borislav Petkov <bp@suse.de>