Remove unused `student_only?` method
Remove unused `student_only?` method

sfu/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,va7map/canvas-lms,grahamb/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,grahamb/canvas-lms