Remove more dead calendar code
Remove more dead calendar code

Fixes CNVS-20058

Test plan:
 - Thoroughly regression test calendar
   - Clear your browser's cache beforehand, just to make triple sure

Change-Id: I047a614adcfaa963c7f3ff902dac7184ef8a8403
Reviewed-on: https://gerrit.instructure.com/52978
Tested-by: Jenkins
Reviewed-by: Jonathan Featherstone <c99460343437e667b0585ea68fd7caf7bd0a02ab@instructure.com>
QA-Review: Derek Hansen <cb1116771307a93b98b6babf698410ed3846296d@instructure.com>
Product-Review: Cosme Salazar <d37f5e06cd46b8fd23ce5553334e09ede5394232@instructure.com>

fronteerio/canvas-lms,Rvor/canvas-lms,kyroskoh/canvas-lms,shidao-fm/canvas-lms,grahamb/canvas-lms,efrj/canvas-lms,whalejasmine/canvas-lms,snehakachroo1/LSI_replica,shidao-fm/canvas-lms,HotChalk/canvas-lms,juoni/canvas-lms,tgroshon/canvas-lms,dgynn/canvas-lms,shidao-fm/canvas-lms,whalejasmine/canvas-lms,ShreniiNepal/shrenii_lmp,eCNAP/CANVAS,sdeleon28/canvas-lms,matematikk-mooc/canvas-lms,roxolan/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,juoni/canvas-lms,utkarshx/canvas-lms,sdeleon28/canvas-lms,juoni/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,skmezanul/canvas-lms,narigone/canvas,venturehive/canvas-lms,sfu/canvas-lms,leftplusrightllc/canvas-lms,fronteerio/canvas-lms,matematikk-mooc/canvas-lms,fronteerio/canvas-lms,efrj/canvas-lms,grahamb/canvas-lms,whalejasmine/canvas-lms,jay3126/canvas-lms,ShreniiNepal/shrenii_lmp,greyhwndz/canvas-lms,sdeleon28/canvas-lms,leftplusrightllc/canvas-lms,leftplusrightllc/canvas-lms,eCNAP/CANVAS,SwinburneOnline/canvas-lms,Jyaasa/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,narigone/canvas,AndranikMarkosyan/lms,kyroskoh/canvas-lms,narigone/canvas,jay3126/canvas-lms,wrdsb/canvas-lms,wrdsb/canvas-lms,HotChalk/canvas-lms,antoniuslin/canvas-lms,redconfetti/canvas-lms,instructure/canvas-lms,antoniuslin/canvas-lms,snehakachroo1/LSI_replica,dgynn/canvas-lms,efrj/canvas-lms,fronteerio/canvas-lms,dgynn/canvas-lms,narigone/canvas,roxolan/canvas-lms,greyhwndz/canvas-lms,instructure/canvas-lms,utkarshx/canvas-lms,wrdsb/canvas-lms,eCNAP/CANVAS,AndranikMarkosyan/lms,instructure/canvas-lms,va7map/canvas-lms,ShreniiNepal/shrenii_lmp,matematikk-mooc/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,utkarshx/canvas-lms,djbender/canvas-lms,Jyaasa/canvas-lms,grahamb/canvas-lms,whalejasmine/canvas-lms,antoniuslin/canvas-lms,grahamb/canvas-lms,shidao-fm/canvas-lms,Jyaasa/canvas-lms,sfu/canvas-lms,AndranikMarkosyan/lms,SwinburneOnline/canvas-lms,Rvor/canvas-lms,roxolan/canvas-lms,venturehive/canvas-lms,tgroshon/canvas-lms,skmezanul/canvas-lms,juoni/canvas-lms,venturehive/canvas-lms,SwinburneOnline/canvas-lms,eCNAP/CANVAS,kyroskoh/canvas-lms,tgroshon/canvas-lms,Jyaasa/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,skmezanul/canvas-lms,skmezanul/canvas-lms,tgroshon/canvas-lms,snehakachroo1/LSI_replica,va7map/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,kyroskoh/canvas-lms,greyhwndz/canvas-lms,AndranikMarkosyan/lms,efrj/canvas-lms,leftplusrightllc/canvas-lms,Rvor/canvas-lms,grahamb/canvas-lms,jay3126/canvas-lms,snehakachroo1/LSI_replica,HotChalk/canvas-lms,SwinburneOnline/canvas-lms,roxolan/canvas-lms,jay3126/canvas-lms,redconfetti/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,utkarshx/canvas-lms,greyhwndz/canvas-lms,matematikk-mooc/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,redconfetti/canvas-lms,ShreniiNepal/shrenii_lmp,antoniuslin/canvas-lms,instructure/canvas-lms