fix: patch ollama bug w/ raw mode

[cpacker]

Please describe the purpose of this pull request.

PR #631 created a bug w/ ollama where we specified raw mode but also left in the old (redundant) params:

    raise Exception(
Exception: API call got non-200 response code (code=400, msg={"error":"raw mode does not support template, system, or context"}) for address: http://localhost:11434/api/generate. Make sure that the ollama API server is running and reachable at http://localhost:11434/api/generate.