diff --git a/broker/src/main/java/io/moquette/BrokerConstants.java b/broker/src/main/java/io/moquette/BrokerConstants.java
index 5d437be5..ec7afcab 100755
--- a/broker/src/main/java/io/moquette/BrokerConstants.java
+++ b/broker/src/main/java/io/moquette/BrokerConstants.java
@@ -118,8 +118,6 @@ public final class BrokerConstants {
 
     public static final String EMBED_DB_PROPERTY_NAME = "embed.db";
 
-    public static final String HZ_Cluster_Master_Node = "master_node";
-
     public static final String SENSITIVE_Filter_Type = "sensitive.filter.type";
 
     public static final String MESSAGE_Forward_Url = "message.forward.url";
@@ -127,10 +125,6 @@ public final class BrokerConstants {
     public static final String SERVER_MULTI_ENDPOINT = "server.multi_endpoint";
     public static final String SERVER_MULTI_PLATFROM_NOTIFICATION = "server.multi_platform_notification";
 
-    public static final String MONGODB_Client_URI = "mongodb.client_uri";
-    public static final String MONGODB_Database = "mongodb.database";
-    public static final String MONGODB_Data_Expire_Days = "mongodb.data_expire_days";
-
     public static final String MESSAGE_ROAMING = "message.roaming";
     public static final String MESSAGE_Remote_History_Message = "message.remote_history_message";