Bug 31682: Silence automatic linker warn

Bug 31682: Silence automatic linker warn

To test:
1. Open the plack-intranet-error.log in your terminal
2. When editing or adding a bibliographic record, click the button to
link authorities automatically.
3. Notice the warn in the log
4. Apply the patch, restart services and refresh the page
5. Click the button again. There should be no warn

Sponsored-by: Catalyst IT
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>