Remove unneeded deployment

[pamelafox]

Purpose

This PR removes the GPT deployment that we aren't currently using it, since it is redundant with the ChatGPT deployment (same model, gpt-35-turbo). We might use a different deployment in future if instruct becomes available and works well for query generation, but in the meantime, the additional deployment is confusing folks.

Also, while testing this, I discovered the two optional Ask approaches do not work with the Chat Completions API - they only work with the completions API, but 0613 doesn't support completions and is the only version that can be deployed newly now. I'll file that as an issue.

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[X] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• azd up
• start server locally

[srbalakr]

I was working on to make a PR. Thank you.