Revert "[docs] document multi-column order-by"
Revert "[docs] document multi-column order-by"

- was a fat-finger on github UI

This reverts commit ad0aa8f68f5930516cc967f61e28a5d62e10d9d2.

CorvusCorrax/knex,abegines/knex,wubzz/knex,statyan/knex,tgriesser/knex,Atlantis-Software/knex,abegines/knex,noodle/knex,Atlantis-Software/knex,noodle/knex,WaltRock/knex,carragom/knex,CorvusCorrax/knex,carragom/knex,tgriesser/knex,statyan/knex,tgriesser/knex,WaltRock/knex,wubzz/knex