Lint the ArcanistSpellingDefaultData class.

Summary:
Currently, the ArcanistSpellingDefaultData is marked with a @nolint annotation. This means that it doesn't get linted by any linters. Really, the intention here was to make sure that this file isn't linted by the ArcanistSpellingLinter linter.

Now that the .arclint file is more mature, we can easily just exclude this file from being linted only by the spelling linter, whilst allowing other linters to run.

Test Plan: Ran arc lint.

Reviewers: epriestley, Blessed Reviewers

Reviewed By: epriestley, Blessed Reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9432