81bbdaf util: Drop unused var @errbuf from virPCIGetDeviceAddressFromSysfsLink

1 file Authored by Wang King 7 years ago, Committed by Erik Skultety 7 years ago,
    util: Drop unused var @errbuf from virPCIGetDeviceAddressFromSysfsLink
    
    Commit @a7035662 forgot to remove it when doing a refactor.
    
    Signed-off-by: Erik Skultety <eskultet@redhat.com>
    
        
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