def DeleteInstanceTags(r, instance, tags, dry_run=False):
    """
    Deletes tags from an instance.

    @type instance: str
    @param instance: instance to delete tags from
    @type tags: list of str
    @param tags: tags to delete
    @type dry_run: bool
    @param dry_run: whether to perform a dry run
    """
    query = {'tag': tags, 'dry-run': dry_run}
    return r.request('delete', '/2/instances/%s/tags' % instance, query=query)
