Remove --ansi flag

[andyexeter]

This PR removes the --ansi flag from the deploy command.

With ansi enabled, errors in actions when using dark mode on GitHub are garish and blinding. Passing --no-ansi to the dep option doesn't work, presumably because the --ansi flag comes before it.

By removing it, it can be left to the developer to explicitly enable or disable it within the dep option, e.g:

with:
  dep: deploy --no-ansi

Or

with:
  dep: deploy --ansi