disable led while charging

Fixes b/6970382

Change-Id: Idb823059424a0fa1f6382dc01d56c6c4f668c45c
diff --git a/liblight/lights.c b/liblight/lights.c
index 49fb590..b9d1e48 100644
--- a/liblight/lights.c
+++ b/liblight/lights.c
@@ -205,17 +205,6 @@
 }
 
 static int
-set_light_battery(struct light_device_t* dev,
-        struct light_state_t const* state)
-{
-    pthread_mutex_lock(&g_lock);
-    g_battery = *state;
-    handle_speaker_battery_locked(dev);
-    pthread_mutex_unlock(&g_lock);
-    return 0;
-}
-
-static int
 set_light_notifications(struct light_device_t* dev,
         struct light_state_t const* state)
 {
@@ -268,8 +257,6 @@
 
     if (0 == strcmp(LIGHT_ID_BACKLIGHT, name))
         set_light = set_light_backlight;
-    else if (0 == strcmp(LIGHT_ID_BATTERY, name))
-        set_light = set_light_battery;
     else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
         set_light = set_light_notifications;
     else if (0 == strcmp(LIGHT_ID_ATTENTION, name))