D2640: cbor: remove tests files and fix core's test-check*

[pulkit (Pulkit Goyal)]

pulkit abandoned this revision.
pulkit added a comment.


  Superseded by https://phab.mercurial-scm.org/D2751.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2640

To: pulkit, #hg-reviewers
Cc: durin42, mercurial-devel