usb: cdns3: core: removed cdns3_get_current_role_driver function

Function is not used in driver so it can be removed.
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/cdns3/core.c

@@ -27,13 +27,6 @@
 
 static int cdns3_idle_init(struct cdns3 *cdns);
 
-static inline
-struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns)
-{
-	WARN_ON(!cdns->roles[cdns->role]);
-	return cdns->roles[cdns->role];
-}
-
 static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role)
 {
 	int ret;