Delete miscommitted file.

dropwizard/src/main/java/com`example/helloworld/db/WorldDAO.java

@@ -1,22 +0,0 @@
-
-package com.example.helloworld.db;
-
-import org.hibernate.SessionFactory;
-
-import com.example.helloworld.core.World;
-import com.google.common.base.Optional;
-import com.yammer.dropwizard.hibernate.AbstractDAO;
-
-public class WorldDAO
-    extends AbstractDAO<World>
-{
-  public WorldDAO(SessionFactory factory)
-  {
-    super(factory);
-  }
-
-  public Optional<World> findById(Long id)
-  {
-    return Optional.fromNullable(get(id));
-  }
-}