TagsByDate should throw if more than 1 lightweight tags are applied to the same commit

[SimonCropp]

so TagsByDate looks like this

    public static IEnumerable<Tag> TagsByDate(this IRepository repository, Commit commit)
    {
        return repository.Tags
            .Where(tag => tag.PeeledTarget() == commit)
            .OrderByDescending(tag =>
            {
                if (tag.Annotation != null)
                {
                    return tag.Annotation.Tagger.When;
                }
                //lightweight tags will not have an Annotation
                return commit.Committer.When;
            });
    }

So if more than one lightweight tag is applied to the same commit ther is no sensible order that can be applied to those tags. So it should throw an exception

[JakeGinnivan]

@SimonCropp can you check this against the 3.0 branch. Not sure it is still an issue

I just deleted TagsByDate as it is not used, but worth checking that the scenario has not moved elsewhere

[SimonCropp]

@JakeGinnivan looking how all tags for a commit are now tryparsed i dont think this is an issue anymore