PCI: sysfs: Remove unused attribute groups

56c1af46 ("PCI: Add sysfs max_link_speed/width,
current_link_speed/width, etc") added the following objects, but they are
unused, so remove them:

  pci_bridge_group
  pci_bridge_groups
  pcie_dev_group
  pcie_dev_groups

This fixes the following warnings from sparse:

  drivers/pci/pci-sysfs.c:1546:30: warning: symbol 'pci_bridge_groups' was not declared. Should it be static?
  drivers/pci/pci-sysfs.c:1555:30: warning: symbol 'pcie_dev_groups' was not declared. Should it be static?

Link: https://lore.kernel.org/r/20191016080324.12864-1-ben.dooks@codethink.co.ukSigned-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/pci-sysfs.c

@@ -1539,24 +1539,6 @@ const struct attribute_group *pci_dev_groups[] = {
 	NULL,
 };
 
-static const struct attribute_group pci_bridge_group = {
-	.attrs = pci_bridge_attrs,
-};
-
-const struct attribute_group *pci_bridge_groups[] = {
-	&pci_bridge_group,
-	NULL,
-};
-
-static const struct attribute_group pcie_dev_group = {
-	.attrs = pcie_dev_attrs,
-};
-
-const struct attribute_group *pcie_dev_groups[] = {
-	&pcie_dev_group,
-	NULL,
-};
-
 static const struct attribute_group pci_dev_hp_attr_group = {
 	.attrs = pci_dev_hp_attrs,
 	.is_visible = pci_dev_hp_attrs_are_visible,