spec: disable last_authored_message_at checks
spec: disable last_authored_message_at checks

CNVS-13598 fixed some instances where last_authored_message_at was
not being set correctly. unfortunately, it caused regressions in
forwarding and reply-all. CNVS-14333 reverted CNVS-13598, but
left fragile last_authored_message_at checks.

this commit removes those checks. they should be put back when we
fix the original problem in CNVS-13598

Change-Id: Iaa04d8c3ee41e9753b9f8ea042e035b12cc619f6
Reviewed-on: https://gerrit.instructure.com/38680
Product-Review: Bryan Madsen <0a3ba1af216659500dd8f41e29f3979f42452870@instructure.com>
QA-Review: Bryan Madsen <0a3ba1af216659500dd8f41e29f3979f42452870@instructure.com>
Reviewed-by: Mark Severson <cdf1f90aee9d0d073a2a24141ebc71887f3ba533@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>

ShreniiNepal/shrenii_lmp,SwinburneOnline/canvas-lms,dgynn/canvas-lms,snehakachroo1/LSI_replica,wrdsb/canvas-lms,instructure/canvas-lms,SwinburneOnline/canvas-lms,utkarshx/canvas-lms,utkarshx/canvas-lms,wye0220/shindig-canvas,whalejasmine/canvas-lms,wye0220/shindig-canvas,leftplusrightllc/canvas-lms,jay3126/canvas-lms,redconfetti/canvas-lms,juoni/canvas-lms,sfu/canvas-lms,juoni/canvas-lms,gbleydon/canvas-lms,sfu/canvas-lms,skmezanul/canvas-lms,kyroskoh/canvas-lms,antoniuslin/canvas-lms,ShreniiNepal/shrenii_lmp,instructure/canvas-lms,Jyaasa/canvas-lms,samuels410/greatlakes-lms,kyroskoh/canvas-lms,snehakachroo1/LSI_replica,efrj/canvas-lms,roxolan/canvas-lms,skmezanul/canvas-lms,sfu/canvas-lms,sdeleon28/canvas-lms,venturehive/canvas-lms,skmezanul/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,greyhwndz/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,wrdsb/canvas-lms,Jyaasa/canvas-lms,matematikk-mooc/canvas-lms,efrj/canvas-lms,Rvor/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,venturehive/canvas-lms,AndranikMarkosyan/lms,va7map/canvas-lms,wrdsb/canvas-lms,leftplusrightllc/canvas-lms,eCNAP/CANVAS,narigone/canvas,dgynn/canvas-lms,HotChalk/canvas-lms,instructure/canvas-lms,matematikk-mooc/canvas-lms,HotChalk/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,snehakachroo1/LSI_replica,whalejasmine/canvas-lms,wrdsb/canvas-lms,kyroskoh/canvas-lms,redconfetti/canvas-lms,efrj/canvas-lms,shidao-fm/canvas-lms,shidao-fm/canvas-lms,grahamb/canvas-lms,leftplusrightllc/canvas-lms,whalejasmine/canvas-lms,greyhwndz/canvas-lms,eCNAP/CANVAS,grahamb/canvas-lms,SwinburneOnline/canvas-lms,narigone/canvas,tgroshon/canvas-lms,djbender/canvas-lms,HotChalk/canvas-lms,jay3126/canvas-lms,eCNAP/CANVAS,Jyaasa/canvas-lms,matematikk-mooc/canvas-lms,gbleydon/canvas-lms,efrj/canvas-lms,tgroshon/canvas-lms,AndranikMarkosyan/lms,roxolan/canvas-lms,fronteerio/canvas-lms,fronteerio/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,wye0220/shindig-canvas,utkarshx/canvas-lms,leftplusrightllc/canvas-lms,matematikk-mooc/canvas-lms,grahamb/canvas-lms,va7map/canvas-lms,dgynn/canvas-lms,tgroshon/canvas-lms,fronteerio/canvas-lms,eCNAP/CANVAS,Rvor/canvas-lms,shidao-fm/canvas-lms,va7map/canvas-lms,instructure/canvas-lms,whalejasmine/canvas-lms,venturehive/canvas-lms,shidao-fm/canvas-lms,juoni/canvas-lms,juoni/canvas-lms,jay3126/canvas-lms,roxolan/canvas-lms,AndranikMarkosyan/lms,Jyaasa/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,AndranikMarkosyan/lms,narigone/canvas,Rvor/canvas-lms,samuels410/greatlakes-lms,samuels410/greatlakes-lms,grahamb/canvas-lms,antoniuslin/canvas-lms,sdeleon28/canvas-lms,ShreniiNepal/shrenii_lmp,jay3126/canvas-lms,Rvor/canvas-lms,antoniuslin/canvas-lms,snehakachroo1/LSI_replica,antoniuslin/canvas-lms,gbleydon/canvas-lms,greyhwndz/canvas-lms,djbender/canvas-lms,skmezanul/canvas-lms,tgroshon/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,utkarshx/canvas-lms,kyroskoh/canvas-lms,greyhwndz/canvas-lms,narigone/canvas,dgynn/canvas-lms,fronteerio/canvas-lms,samuels410/greatlakes-lms,roxolan/canvas-lms,ShreniiNepal/shrenii_lmp