I would get rid of this one and leave the other

I know. But I am not sure that two pencils are allowed. Are they?

And how do you remove an entry?

Author you can red flag the entry you wish to remove, asking
the mods to remove it. But you should give a good reason as to why you request this. That still does not mean they will remove. But it is worth a try if you have a valid reason.
Another option is to edit. I do not see a problem though.
Good luck

Thanks cabldawg71

I would just enter a new one in this place. go to "My stuff" then "my contest entries" and find this photo and should see something that says "edit entry". Then you can browse for a new photo, make sure to check the box "high resolution" and then click "submit" Having two photos very similar loses anonymity here which is not allowed. I wouldn't see there being a problem with the other one having 2 of each, but I'm not a mod so I can't be for sure. In my opinion, the other one is better.