OpenSearch XML Not found

[ch-ncolley]

Source code:
https://github.com/companieshouse/ch.gov.uk/blob/master/public/opensearch.xml

Which is referenced in the base layout:

ch.gov.uk/templates/base.tx

Line 68 in 323cd0e

<link rel="search" type="application/opensearchdescription+xml" href="/opensearch.xml">

In the live environment it fails to load:
https://find-and-update.company-information.service.gov.uk/opensearch.xml

Is this needed anymore? Should it be removed?

If it is needed, we need to allow it to be loaded.