Removes specified step from specified recipe
204 Status returned on success
curl -i -X DELETE -u user:userpass <api_url>/recipes/:recipe_id/recipe_steps/:recipe_step_id.json -H 'Accept: application/json' -H 'Content-type: application/xml'
curl -i -X DELETE -u user:userpass <api_url>/recipes/:recipe_id/recipe_steps/:recipe_step_id.xml -H 'Accept: application/xml' -H 'Content-type: application/xml'