delete error reports based on creation date
delete error reports based on creation date

We already have an index on creation date. These are mostly immutable, so I'm
not sure why we would want to purge based on updated date.

Change-Id: Ie52cee3d364dffbf644a73efa9322bf00e3bb362
Reviewed-on: https://gerrit.instructure.com/3942
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>

venturehive/canvas-lms,antoniuslin/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,loganrun/pincan,HotChalk/canvas-lms,gbleydon/canvas-lms,eCNAP/CANVAS,wye0220/shindig-canvas,Unow/ins,sfu/canvas-lms,greyhwndz/canvas-lms,fronteerio/canvas-lms,juoni/canvas-lms,utkarshx/canvas-lms,efrj/canvas-lms,Unow/canvas-lms,dgynn/canvas-lms,loganrun/pincan,snehakachroo1/LSI_replica,antoniuslin/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,redconfetti/canvas-lms,SwinburneOnline/canvas-lms,eCNAP/CANVAS,dgynn/canvas-lms,rup/Tarrax,ottenhoff/canvas-lms,leftplusrightllc/canvas-lms,Unow/ins,Rvor/canvas-lms,samuels410/greatlakes-lms,arrivu/jigsaw-lms,parbros/red-innovadores-lms,juoni/canvas-lms,grahamb/canvas-lms,ankithbti/canvas_lms,merichar/canvas-lms,antoniuslin/canvas-lms,faraazkhan/canvas,wimemx/Canvas,matematikk-mooc/canvas-lms,samuels410/greatlakes-lms,grahamb/canvas-lms,narigone/canvas,grahamb/canvas-lms,arrivu/hoodemo,AndranikMarkosyan/lms,djbender/canvas-lms,matematikk-mooc/canvas-lms,Jyaasa/canvas-lms,arrivu/qibla-ecampus,arrivu/arrivu-lms,ShreniiNepal/shrenii_lmp,wrdsb/canvas-lms,Jyaasa/canvas-lms,arrivu/hiring-site,sfu/canvas-lms,wrdsb/canvas-lms,HotChalk/canvas-lms,djbender/canvas-lms,fronteerio/canvas-lms,faraazkhan/canvas,efrj/canvas-lms,faraazkhan/canvas,skmezanul/canvas-lms,instructure/canvas-lms,nditech/red-innovadores-lms,whalejasmine/canvas-lms,kyroskoh/canvas-lms,utkarshx/canvas-lms,venturehive/canvas-lms,usmschuck/canvas,matematikk-mooc/canvas-lms,wimemx/Canvas,kyroskoh/canvas-lms,parbros/red-innovadores-lms,Unow/ins,sdeleon28/canvas-lms,em2/canvas-lms,narigone/canvas,redconfetti/canvas-lms,Unow/canvas-lms,gbleydon/canvas-lms,ShreniiNepal/shrenii_lmp,tgroshon/canvas-lms,djbender/canvas-lms,arrivu/hoodemo,sdeleon28/canvas-lms,skmezanul/canvas-lms,utkarshx/canvas-lms,skmezanul/canvas-lms,efrj/canvas-lms,ShreniiNepal/shrenii_lmp,skmezanul/canvas-lms,AndranikMarkosyan/lms,sfu/canvas-lms,juoni/canvas-lms,gbleydon/canvas-lms,arrivu/hiring-site,jay3126/canvas-lms,jay3126/canvas-lms,em2/canvas-lms,redconfetti/canvas-lms,efrj/canvas-lms,arrivu/qibla-ecampus,grahamb/canvas-lms,antoniuslin/canvas-lms,greyhwndz/canvas-lms,instructure/canvas-lms,wrdsb/canvas-lms,shidao-fm/canvas-lms,parbros/red-innovadores-lms,va7map/canvas-lms,eCNAP/CANVAS,dgynn/canvas-lms,sli7246/canvas_branch,ShreniiNepal/shrenii_lmp,snehakachroo1/LSI_replica,arrivu/arrivu-lms,nditech/red-innovadores-lms,whalejasmine/canvas-lms,tgroshon/canvas-lms,nditech/red-innovadores-lms,landonwilkins/canvas-lms,va7map/canvas-lms,arrivu/arrivu-lms,instructure/canvas-lms,tgroshon/canvas-lms,djbender/canvas-lms,icelab/canvas,venturehive/canvas-lms,ankithbti/canvas_lms,ankithbti/canvas_lms,eCNAP/CANVAS,shidao-fm/canvas-lms,arrivu/hiring-site,icelab/canvas,sli7246/canvas_branch,greyhwndz/canvas-lms,narigone/canvas,va7map/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,Jyaasa/canvas-lms,usmschuck/canvas,wimemx/Canvas,AndranikMarkosyan/lms,sli7246/canvas_branch,HotChalk/canvas-lms,roxolan/canvas-lms,Rvor/canvas-lms,utkarshx/canvas-lms,merichar/canvas-lms,AndranikMarkosyan/lms,instructure/canvas-lms,arrivu/jigsaw-lms,Jyaasa/canvas-lms,narigone/canvas,instructure/canvas-lms,loganrun/pincan,ottenhoff/canvas-lms,samuels410/greatlakes-lms,landonwilkins/canvas-lms,dgynn/canvas-lms,shidao-fm/canvas-lms,jay3126/canvas-lms,leftplusrightllc/canvas-lms,SwinburneOnline/canvas-lms,nditech/red-innovadores-lms,grahamb/canvas-lms,rup/Tarrax,rup/Tarrax,sfu/canvas-lms,redconfetti/canvas-lms,instructure/canvas-lms,juoni/canvas-lms,shidao-fm/canvas-lms,ottenhoff/canvas-lms,va7map/canvas-lms,wye0220/shindig-canvas,kyroskoh/canvas-lms,landonwilkins/canvas-lms,arrivu/jigsaw-lms,fronteerio/canvas-lms,usmschuck/canvas,samuels410/greatlakes-lms,instructure/canvas-lms,kyroskoh/canvas-lms,whalejasmine/canvas-lms,HotChalk/canvas-lms,arrivu/hoodemo,sdeleon28/canvas-lms,SwinburneOnline/canvas-lms,whalejasmine/canvas-lms,leftplusrightllc/canvas-lms,roxolan/canvas-lms,leftplusrightllc/canvas-lms,snehakachroo1/LSI_replica,arrivu/qibla-ecampus,jay3126/canvas-lms,matematikk-mooc/canvas-lms,icelab/canvas,sfu/canvas-lms,landonwilkins/canvas-lms,greyhwndz/canvas-lms,snehakachroo1/LSI_replica,Rvor/canvas-lms,Unow/canvas-lms,em2/canvas-lms,usmschuck/canvas,venturehive/canvas-lms,tgroshon/canvas-lms,wye0220/shindig-canvas,merichar/canvas-lms,SwinburneOnline/canvas-lms,fronteerio/canvas-lms