remove 'replace' feature in bundle

[karenetheridge]

I was reading json-schema-org/json-schema-spec#514 and json-schema-org/json-schema-spec#628 and realized that the 'replace' option in bundle() is treating $ref like an inclusion, not a delegation, which is wrong. $refs should always remain as-is, so its sub-schema can be delegated to (evaluated in place), as described in that ticket.

I see that this feature was already deprecated once, in version 3.10, and then undeprecated although left undocumented, so there shouldn't be any serious ramifications here. So this ticket is mostly informational at this point.

[jhthorsen]

I'm using "replace" in JSON::Validator::OpenAPI::Mojolicious, so this cannot be done before I merge #189 and implement subclasses for OpenAPIv2 and OpenAPIv3.

[jhthorsen]

This feature is no longer present in #251.