[BUG][CSHARP-FUNCTIONS] Remove unsupported version #23303
Description
Bug Report Checklist
- Have you provided a full/minimal spec to reproduce the issue?
- Have you validated the input using an OpenAPI validator?
- Have you tested with the latest master to confirm the issue still exists?
- Have you searched for related issues/PRs?
- What's the actual output vs expected output?
- [Optional] Sponsorship to speed up the bug fix or feature request (example)
Description
csharp-function generator handles v3 versions of Azure Functions, but it is no longer supported. Can we remove support for v3?
Suggest a fix
I am open to creating a PR.