Remove duplicate method

src/main/java/teammates/common/util/HibernateUtil.java

@@ -244,17 +244,6 @@ public static <T extends BaseEntity> T get(Class<T> entityType, Object id) {
         return getCurrentSession().get(entityType, id);
     }
 
-    /**
-     * Return an instance, whose state may be lazily fetched.
-     * Id is the only field that is fetched eagerly.
-     * If there is no such persistent instance, EntityNotFoundException is thrown when the instance state
-     * is first accessed. This method can be used to increase performance, if it is known that the instance exists
-     * and fetching of other attributes of the entity is not necessary.
-     */
-    public static <T extends BaseEntity> T getReference(Class<T> entityType, Object id) {
-        return HibernateUtil.getCurrentSession().getReference(entityType, id);
-    }
-
     /**
      * Return the persistent instance of the given entity class with the given natural id,
      * or null if there is no such persistent instance.