fix signature verification link

[adridadou]

This PR does 2 things:

• remove an unused class that is in conflict with another one in the main project
• fix the URL generated to verify a signature

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This change is 

[craig-openlaw]

Would it be possible to make a regression test for this with our current test infrastructure?

[fforbeck]

Not sure if I got the idea here. Do we need to build the link to the signature proof on openlaw core? Because it depends on openlaw app context. Could we just instantiate the link on openlaw app with the proper data? I mean, for each change in the app context it will require a new change in the core lib to fix the context.

[adridadou]

The issue here is that this is part of the rendering process, i.e. we need to generate this link within the rendering process.

So for now, this is the solution we have found. We can def. create an issue to extract that (or actually just put a pin on it for when we're going to work more on the signature process) so we don't have this issue anymore.

I agree this is not an ideal architecture but this is what works right now

[fforbeck]

Looks good. I just raised the new ticket #207