diff --git a/datastore/src/main/java/net/jami/datastore/dao/DeviceDao.java b/datastore/src/main/java/net/jami/datastore/dao/DeviceDao.java
index 6af5941495ee0edb7f6a933f9a93004e25a63f06..3ad772b3f3ff4b4d2012688be2fcefbd7b7a3a80 100644
--- a/datastore/src/main/java/net/jami/datastore/dao/DeviceDao.java
+++ b/datastore/src/main/java/net/jami/datastore/dao/DeviceDao.java
@@ -78,11 +78,6 @@ public class DeviceDao extends AbstractDao<Device> {
         }
     }
 
-    @Override
-    public boolean deleteObject(LinkedHashMap<String, String> constraints) {
-        return false;
-    }
-
     @Override
     public boolean updateObject(StatementList update, StatementList constraints) {
         return false;
diff --git a/datastore/src/main/java/net/jami/datastore/dao/SystemDao.java b/datastore/src/main/java/net/jami/datastore/dao/SystemDao.java
index 7cb9e1587a8ab624870a486a862c109cc27722be..4c2aa080967438cdb8a3f9713d00d2d56b50f034 100644
--- a/datastore/src/main/java/net/jami/datastore/dao/SystemDao.java
+++ b/datastore/src/main/java/net/jami/datastore/dao/SystemDao.java
@@ -76,11 +76,6 @@ public class SystemDao extends AbstractDao<SystemAccount> {
         }
     }
 
-    @Override
-    public boolean deleteObject(LinkedHashMap<String, String> constraints) {
-        return false;
-    }
-
     @Override
     public boolean updateObject(StatementList update, StatementList constraints) {
         return false;
diff --git a/datastore/src/main/java/net/jami/datastore/dao/UserDao.java b/datastore/src/main/java/net/jami/datastore/dao/UserDao.java
index e5b75b84902df1a90abb9fd8f39c77c4985d5ac6..ccdf13f877e98739a52ade6c067499e8075d22c7 100644
--- a/datastore/src/main/java/net/jami/datastore/dao/UserDao.java
+++ b/datastore/src/main/java/net/jami/datastore/dao/UserDao.java
@@ -83,10 +83,4 @@ public class UserDao extends AbstractDao<User> {
             DataStore.connectionPool.returnConnection(connection);
         }
     }
-
-
-    @Override
-    public boolean deleteObject(LinkedHashMap<String, String> constraints) {
-        return false;
-    }
 }
diff --git a/datastore/src/main/java/net/jami/datastore/dao/UserProfileDao.java b/datastore/src/main/java/net/jami/datastore/dao/UserProfileDao.java
index f049b9975686f401db2897865049708eb9aa5c02..49fbab606cc8e113a118db818732bc699fc02c21 100644
--- a/datastore/src/main/java/net/jami/datastore/dao/UserProfileDao.java
+++ b/datastore/src/main/java/net/jami/datastore/dao/UserProfileDao.java
@@ -60,9 +60,4 @@ public class UserProfileDao extends AbstractDao<UserProfile> {
     public boolean storeObject(UserProfile object) {
         return false;
     }
-
-    @Override
-    public boolean deleteObject(LinkedHashMap<String, String> constraints) {
-        return false;
-    }
 }