Revert "Pass uploaded image filename to view in admin_add()"

This reverts commit ee7257dffe28b5b201f4af7123b13001152c8fd0.
Revert "Add instructor bio and picture sections"

This reverts commit 86348a78f0965b2eaf11b4f6dbc03d8dce6dd28d.
Revert "Ignore bio section if user is not an instructor in admin_add()"

This reverts commit ff24c96d3c896098fcdb6a2d3983f28e0ffa9532.
Pass $instructor_id to views that use bios/form element