Change Vault hook to use new per-world perms system

common/src/main/java/me/lucko/luckperms/users/UserManager.java

@@ -3,7 +3,6 @@ package me.lucko.luckperms.users;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import me.lucko.luckperms.LuckPermsPlugin;
-import me.lucko.luckperms.data.Datastore;
 import me.lucko.luckperms.exceptions.ObjectAlreadyHasException;
 
 import java.util.Map;
@@ -74,16 +73,6 @@ public abstract class UserManager {
         }
     }
 
-    /**
-     * Saves a user object in the datastore
-     * @param user the user to save
-     * @param datastore the datastore
-     */
-    public void saveUser(User user, Datastore datastore) {
-        user.refreshPermissions();
-        datastore.saveUser(user, success -> {});
-    }
-
     /**
      * Set a user to the default group
      * @param user the user to give to