rollback use of preload on association before it's supported
rollback use of preload on association before it's supported

partially reverts a43ce6c0a44f35f8d49424ee3a0cbbe89837a513

Change-Id: I982f98862ad5c80ad672ed49f40e1c04559e8bcb

sfu/canvas-lms,AndranikMarkosyan/lms,matematikk-mooc/canvas-lms,dgynn/canvas-lms,fronteerio/canvas-lms,leftplusrightllc/canvas-lms,roxolan/canvas-lms,instructure/canvas-lms,redconfetti/canvas-lms,snehakachroo1/LSI_replica,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,matematikk-mooc/canvas-lms,dgynn/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,grahamb/canvas-lms,redconfetti/canvas-lms,leftplusrightllc/canvas-lms,narigone/canvas,grahamb/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,dgynn/canvas-lms,redconfetti/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,AndranikMarkosyan/lms,snehakachroo1/LSI_replica,narigone/canvas,sfu/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,AndranikMarkosyan/lms,narigone/canvas,snehakachroo1/LSI_replica,AndranikMarkosyan/lms,fronteerio/canvas-lms,djbender/canvas-lms,narigone/canvas,matematikk-mooc/canvas-lms,roxolan/canvas-lms,SwinburneOnline/canvas-lms,venturehive/canvas-lms,roxolan/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,leftplusrightllc/canvas-lms,snehakachroo1/LSI_replica,leftplusrightllc/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,instructure/canvas-lms,dgynn/canvas-lms