Undiscover ota_update sensor on device remove.

lib/extension/homeassistant.js

@@ -1266,7 +1266,7 @@ class HomeAssistant extends BaseExtension {
         const mappedModel = zigbeeHerdsmanConverters.findByZigbeeModel(device.modelID);
         if (mappedModel) {
             logger.info(`Clearing Home Assistant discovery topic for '${device.ieeeAddr}'`);
-            mapping[mappedModel.model].forEach((config) => {
+            this.getConfigs(mappedModel).forEach((config) => {
                 const topic = this.getDiscoveryTopic(config, device);
                 this.mqtt.publish(topic, null, {retain: true, qos: 0}, this.discoveryTopic);
             });
@@ -1285,6 +1285,14 @@ class HomeAssistant extends BaseExtension {
         }
     }
 
+    getConfigs(mappedModel) {
+        const configs = mapping[mappedModel.model].slice();
+        if (mappedModel.hasOwnProperty('ota')) {
+            configs.push(cfg.binary_sensor_update_available);
+        }
+        return configs;
+    }
+
     discover(device, mappedModel, force=false) {
         // Check if already discoverd and check if there are configs.
         const discover = force || !this.discovered[device.ieeeAddr];
@@ -1298,12 +1306,7 @@ class HomeAssistant extends BaseExtension {
             return;
         }
 
-        const configs = mapping[mappedModel.model].slice();
-        if (mappedModel.hasOwnProperty('ota')) {
-            configs.push(cfg.binary_sensor_update_available);
-        }
-
-        configs.forEach((config) => {
+        this.getConfigs(mappedModel).forEach((config) => {
             const topic = this.getDiscoveryTopic(config, device);
             const payload = {...config.discovery_payload};
             const stateTopic = `${settings.get().mqtt.base_topic}/${entity.friendlyName}`;