remove unnecessary class

service/src/main/java/com/telephoners/krakyournet/ctf/DBUtils.java

-package com.telephoners.krakyournet.ctf;
-
-import com.mongodb.client.FindIterable;
-import org.bson.Document;
-
-import java.util.ArrayList;
-
-/**
- * Created by gpietrus on 20.02.2016.
- */
-public class DBUtils {
-    public static ArrayList<Document> toList(FindIterable<Document> documents) {
-        ArrayList<Document> into = documents.into(new ArrayList<Document>());
-        return into;
-    }
-}