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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def unpublish(scm, published_branch, verbose, fake):
 """Removes a published branch from the remote repository."""

    scm.fake = fake
    scm.verbose = fake or verbose

    scm.repo_check(require_remote=True)
    branch = scm.fuzzy_match_branch(published_branch)

    if not branch:
        scm.display_available_branches()
        raise click.BadArgumentUsage('Please specify a branch to unpublish')

    branch_names = scm.get_branch_names(local=False)

    if branch not in branch_names:
        raise click.BadArgumentUsage(
            "Branch {0} is not published. Use a branch that is published."
            .format(crayons.yellow(branch)))

    status_log(scm.unpublish_branch, 'Unpublishing {0}.'.format(
        crayons.yellow(branch)), branch)