don't expect context for feature_enabled?
don't expect context for feature_enabled?

test plan
 - have a public course
 - try to view files in public course
 - it should not error

fixes VICE-1217
flag=granular_permissions_course_files

Change-Id: Icdc2e4646e5aaaeabe0b08c1494800aeee22180e
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/260578
Reviewed-by: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms