remove the empty fields

[skaunov]

Am I correct these fields are excessive? Or were those added for a perspective of other lock scripts which will be using it?

If so, then I have the following also.

• why to have all these until an alternative lock script starting to appear?
• Is it better to have the standard one present in the core? Will the code for an alternative be added to the core too?
• Do you think a developer of an alternative will be sticking to this struct or make their own?