[PATCH] docs: power: update documentation about removed function

[Julia Lawall]

The function cm_notify_event() was removed in commit 9584051f3cf3
("power: supply: charger-manager: Remove cm_notify_event function").
Remove the documentation that suggests how it can be used.

Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxxx>

---

There is also a reference to cm_notify_event in
drivers/power/supply/charger-manager.c that is less clear what to do
with:

        /*
         * Charger-manager is capable of waking up the system from sleep
         * when event is happened through cm_notify_event()
         */
	device_init_wakeup(&pdev->dev, true);
        device_set_wakeup_capable(&pdev->dev, false);

 Documentation/power/charger-manager.rst |   12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/Documentation/power/charger-manager.rst b/Documentation/power/charger-manager.rst
index 84fab9376792..b29c962cacdc 100644
--- a/Documentation/power/charger-manager.rst
+++ b/Documentation/power/charger-manager.rst
@@ -183,17 +183,7 @@ struct charger_desc elements:
 	the value of measure_battery_temp.
 
 
-5. Notify Charger-Manager of charger events: cm_notify_event()
-==============================================================
-If there is an charger event is required to notify
-Charger Manager, a charger device driver that triggers the event can call
-cm_notify_event(psy, type, msg) to notify the corresponding Charger Manager.
-In the function, psy is the charger driver's power_supply pointer, which is
-associated with Charger-Manager. The parameter "type"
-is the same as irq's type (enum cm_event_types). The event message "msg" is
-optional and is effective only if the event type is "UNDESCRIBED" or "OTHERS".
-
-6. Other Considerations
+5. Other Considerations
 =======================
 
 At the charger/battery-related events such as battery-pulled-out,