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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 remove_supervisor_app(app_name):
 """Remove Supervisor app configuration."""


    app = u'/etc/supervisor/conf.d/%s.conf' % app_name
    if files.exists(app):
        sudo(u'rm %s' % app)
        supervisor_command(u'update')