This patch removes the forcedeth device ids from pci_ids.h

The forcedeth driver uses the device id constants directly in its source
file.

[ Need to keep PCI_DEVICE_ID_NVIDIA_NVENET_15 in order to keep
  drivers/pci/quirks.c building -DaveM ]
Signed-off-by: NAyaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>