a6c14096 ("Delete pcibios_select_root") removed pcibios_select_root().
But a7db5040 ("PCI: remove pcibios_scan_all_fns()") added a few copies
back, probably with some incorrect merge conflict resolutions.

Remove the still-unused pcibios_select_root() definitions.
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>