removes unnecessary shared/_accounts_right_side_shared js_block

test plan:
* n/a

Change-Id: If321513dd2b25ff0e5f08c3113d03fae1449c988
Reviewed-on: https://gerrit.instructure.com/29113
Reviewed-by: Jon Jensen <jon@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Steven Shepherd <sshepherd@instructure.com>
Product-Review: Landon Wilkins <lwilkins@instructure.com>