cfg80211: remove unused callback

The ieee80211 class registers a callback which actually does nothing.
Given that the callback is optional, and all its accesses are protected
by a NULL check, remove it entirely.
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Link: https://lore.kernel.org/r/20210208113356.4105-1-mcroce@linux.microsoft.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/sysfs.c

@@ -82,12 +82,6 @@ static void wiphy_dev_release(struct device *dev)
 	cfg80211_dev_free(rdev);
 }
 
-static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
-	/* TODO, we probably need stuff here */
-	return 0;
-}
-
 #ifdef CONFIG_PM_SLEEP
 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
 {
@@ -162,7 +156,6 @@ struct class ieee80211_class = {
 	.owner = THIS_MODULE,
 	.dev_release = wiphy_dev_release,
 	.dev_groups = ieee80211_groups,
-	.dev_uevent = wiphy_uevent,
 	.pm = WIPHY_PM_OPS,
 	.ns_type = &net_ns_type_operations,
 	.namespace = wiphy_namespace,