LP 1485240: More Legacy Circ Script Removal

LP 1485240: More Legacy Circ Script Removal

This commit removes the last few references to the script_runner
used by OpenILS::Application::Circ::Circulate::Circulator to run
JavaScript circ policies.  The script_runner is basically doing
nothing at this point.

To test this commit, apply it to a test system, install Evergreen,
start or restart the open-ils.circ service and check that check
outs and renewals still work.

Signed-off-by: Jason Stephenson <jason@sigio.com>
Signed-off-by: Bill Erickson <berickxx@gmail.com>