refactor(kit/errors): remove the unused errors function

[jsternberg]

It seems that kit/errors was originally created as an experiment for
the error handling that is in the root package. The New method seems
to have been exclusively used by portions of the code that likely got
the wrong or unintended implementation by using goimports rather than
intentionally.

The proper influxdb error handling mechanism is in the root package and
not the struct that was in kit/errors so this removes that code and
points the sections of the code that accidentally used that part of the
package to the more appropriate packages for their use cases.

The package will still be around though because it contains a useful way
to aggregate and list multiple errors which is used by one section of
the code.

[stale]

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[stale]

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