spec: remove assignment tab spec
spec: remove assignment tab spec

nuke the assignment header tab spec since we removed that tab
from canvas

Change-Id: I13e60548e2dd32648233b85c877309cc7f46389d
Reviewed-on: https://gerrit.instructure.com/44223
Product-Review: Kyle Rosenbaum <21fbfd7cc2c11bcaa808c4b1a250e52398b19668@instructure.com>
Reviewed-by: Kyle Rosenbaum <21fbfd7cc2c11bcaa808c4b1a250e52398b19668@instructure.com>
QA-Review: Kyle Rosenbaum <21fbfd7cc2c11bcaa808c4b1a250e52398b19668@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>

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