Remove unused _identify_cluster

Author: P-R-O-C-H-Y

libraries/Zigbee/src/Zigbee_ep.h

@@ -31,8 +31,6 @@ class Zigbee_EP {
     esp_zb_cluster_list_t *_cluster_list;
     esp_zb_attribute_list_t *_attribute_cluster;
 
-    esp_zb_identify_cluster_cfg_t *_identify_cluster;
-
     // Set ep config and cluster list
     void set_ep_config(esp_zb_endpoint_config_t ep_config, esp_zb_cluster_list_t *cluster_list) {
         _ep_config = ep_config;

libraries/Zigbee/src/ep/ep_on_off_light.cpp

@@ -5,7 +5,6 @@ ZigbeeLight::ZigbeeLight(uint8_t endpoint) : Zigbee_EP(endpoint) {
     _version = 0;
 
     esp_zb_on_off_light_cfg_t light_cfg = ESP_ZB_DEFAULT_ON_OFF_LIGHT_CONFIG();
-    _identify_cluster = &light_cfg.identify_cfg;
     _cluster_list = esp_zb_on_off_light_clusters_create(&light_cfg); // use esp_zb_zcl_cluster_list_create() instead of esp_zb_on_off_light_clusters_create()
     _ep_config = {       
         .endpoint = _endpoint,

libraries/Zigbee/src/ep/ep_on_off_switch.cpp

@@ -10,7 +10,6 @@ ZigbeeSwitch::ZigbeeSwitch(uint8_t endpoint) : Zigbee_EP(endpoint) {
     _instance = this; // Set the static pointer to this instance
 
     esp_zb_on_off_switch_cfg_t switch_cfg = ESP_ZB_DEFAULT_ON_OFF_SWITCH_CONFIG();
-    _identify_cluster = &switch_cfg.identify_cfg;
     _cluster_list = esp_zb_on_off_switch_clusters_create(&switch_cfg);
 
     _ep_config = {