Bug 9278 - Remove unused OPAC CSS file sanop.css

Bug 9278 - Remove unused OPAC CSS file sanop.css

This patch removes an unused CSS file, sanop.css, included in both OPAC
themes even though it is referenced by neither.

To test, apply the patch and listen for the unhappy protestations of
libraries whose OPACs now look different. If there are none, the
patch works.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
According to Paul's answer (on the mailing list), I sign off this
patch.

Signed-off-by: Elliott Davis <elliott@bywatersolutions.com>
Seems to work as advertised
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>