Prune OCSP nginx configuration

Summary:
Let's Encrypt drop OCSP support.

See https://letsencrypt.org/2024/07/23/replacing-ocsp-with-crls/

Ref T2116.

Test Plan: Deploy to nginx servers

Reviewers: DorianWinty

Reviewed By: DorianWinty

Maniphest Tasks: T2116

Differential Revision: https://devcentral.nasqueron.org/D3638