[error] Remove special error printing pre-processing

We remove the special error printing pre-processing in favor of just
calling the standard printers.

Error printing has been a bit complex for a while due to an incomplete
migration to a new printing scheme based on registering exception
printers; this PR should alleviate that by completing the registration
approach.

After this cleanup, it should not be ever necessary for normal
functions to worry a lot about catching errors and re-raising them,
unless they have some very special needs.

This change also allows to consolidate the `explainErr` and `himsg`
modules into one, removing the need to export the error printing
functions. Ideally we would make the contents of `himsg` more
localized, but this can be done in a gradual way.

0 files changed, 0 insertions, 0 deletions