Hamming: remove tests that don't make sense per 1761 (#1762)
Hamming: remove tests that don't make sense per 1761 (#1762)

* Hamming: remove tests that dont make sense

* return tests & normalise error messages
exercism/x-common,petertseng/x-common,petertseng/x-common,exercism/x-common,jmluy/x-common,jmluy/x-common,jmluy/x-common