Remove all Armstrong components (except for Dev) from this environment

def remove_armstrong():
    """Remove all Armstrong components (except for Dev) from this environment"""

    from pip.util import get_installed_distributions
    pkgs = get_installed_distributions(local_only=True, include_editables=True)
    apps = [pkg for pkg in pkgs
            if pkg.key.startswith('armstrong') and pkg.key != 'armstrong.dev']

    for app in apps:
        run("pip uninstall -y %s" % app.key)

    if apps:
        print(
            "Note: this hasn't removed other dependencies installed by "
            "these components. There's no substitute for a fresh virtualenv.")
    else:
        print("No Armstrong components to remove.")