bug#9237: [PATCH] tests: get rid of obsolete 'error_' shell function

[Jim Meyering]

...
> So, time to remove dead code, right? :-)
>
> What about the attached patch?

Applied.  Thanks.
...
> Subject: [PATCH] tests: get rid of obsolete 'error_' shell function
>
> * tests/init.cfg (framework_failure, getlimits_): Use 'fatal_'
> instead of 'error_'.
> (error_): Delete, it's not used anymore (and one is anyway
> advised to use 'fatal_' instead).
> Update heading comments.
> * tests/shell-or-perl (error_): Renamed ...
> (fatal_): ... to this, for consistency.  Also, add a useful
> comment.