Remove consesus/evaluation.rs?

[bkchr]

This file contains some initial checks that the block number increased or that we can decode/encode the block. It is questionable if we really to keep to do these checks after build each block. In the end other nodes would reject an invalid block anyway and we don't slash for invalid blocks.

Or we prefer a defensive approach anyway?

Yeah this is mainly defensive, we can probably think about removing all these checks.

Originally posted by @bkchr in #11688 (comment)