Allow bypassing test-check-commit runs by specifying '# no-check-commit'
in the description. This should be avoided but is useful for upstream
imports such as pywatchman which will cause check-code to fail otherwise.
We had them on 'test-check-code-hg.t' to avoid collision with the test checking
'check-code' itself. Now that this one have been rename, we can safely remove
this suffix for all of them. This get them in line with 'check-pyflakes.t'.