revert(passbolt): remove clock-skew patch — metadata key already created

The patched PublicKeyValidationService.php and its volume mount are
no longer needed now that the metadata key exists in the database.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

passbolt/compose.yml

@@ -24,8 +24,6 @@ services:
       - ../.data/passbolt/gpg:/etc/passbolt/gpg
       - ../.data/passbolt/jwt:/etc/passbolt/jwt
       - ../.data/passbolt/gnupg:/var/lib/passbolt/.gnupg
-      # Patched to allow 300s clock-skew tolerance in isNotCreatedInTheFutureRule
-      - ./patches/PublicKeyValidationService.php:/usr/share/php/passbolt/src/Service/OpenPGP/PublicKeyValidationService.php:ro
     depends_on:
       db:
         condition: service_healthy