pinctrl: tegra-xusb: Remove unused structure

The structure tegra_xusb_padctl_group is defined but never used and so
remove this.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-tegra-xusb.c

@@ -59,11 +59,6 @@ struct tegra_xusb_padctl_function {
 	unsigned int num_groups;
 };
 
-struct tegra_xusb_padctl_group {
-	const unsigned int *funcs;
-	unsigned int num_funcs;
-};
-
 struct tegra_xusb_padctl_soc {
 	const struct pinctrl_pin_desc *pins;
 	unsigned int num_pins;