Remove automatic install of phpcpd

[Florian-B]

Remove phpcpd from composer requirements.
The sebastian/phpcpd package is abandoned => https://github.com/sebastianbergmann/phpcpd

see: #259

[juanjol]

Hi @Florian-B I'm sorry, I created another PR deleting phpcpd #264. I had not seen this one you had created. Anyway, the one I created I think it removes all reference to phpcpd both code and documentation, so I would say it is more complete. Do you think it would be better to work on this one I created?

[Florian-B]

Hello @juanjol !

I don't have a preference, my PR has just removed the automatic installation of phpcpd which therefore allows phpcpd to be used with PHPqa.

Your PR removes all references to phpcpd, so it is a BC break in use since phpcpd can no longer be used with PHPqa.

I no longer use phpcpd on my projects so both solution are OK for me.