removed_device -> device_removed

lib/controller.js

@@ -328,7 +328,7 @@ class Controller {
                 settings.removeDevice(deviceID);
 
                 logger.info(`Successfully removed ${deviceID}`);
-                this.mqtt.log('removed_device', message);
+                this.mqtt.log('device_removed', message);
             };
 
             // Remove from zigbee network.