Remove constraints.json

[DE0CH]

This file is redundant now since the information is in statement.json. It should be removed, though it doesn't matter too much if it is not.

[Daniel5055]

Are you referring to the old constrains file or do you mean constraints? If so then yeah I can change the executioner to read from statements.json instead once I handle some of these other issues first.

[DE0CH]

Yeah look at me, misspelt constraints again... lol. Yes I mean constraints.json in the problem folder. Please don't worry about this for now. There are checks to ensure the constraints are consistent and there is no negative effect except for some bad form if we leave it like this.

[Daniel5055]

@DE0CH I've recently just made the switch to reading from the statement.json file. So we can start to migrate to that then.