remove duplicate argument in content migration API
remove duplicate argument in content migration API

settings[file_url] was duplicated, as was source_course_id

Fixes SIS-279

Change-Id: Ied36085cfdb311c666a0d8c792ab475aa0452630
Reviewed-on: https://gerrit.instructure.com/34981
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Eric Adams <5108e8d39c3daf832a5d5b01c70727c22a362224@instructure.com>
Product-Review: Eric Adams <5108e8d39c3daf832a5d5b01c70727c22a362224@instructure.com>
QA-Review: Jeremy Putnam <b030d6d6f199f844ec424882be473c2ab9adc93b@instructure.com>

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