fix(oci): stop sending logprobs — not supported on OCI on-demand

logprobs is not a valid parameter for OCI Generative AI on-demand
inference. Sending it causes a 400 error. Removed from request
transformation.

Author: fede-kamel

src/cohere/oci_client.py

@@ -780,8 +780,7 @@ def transform_request_to_oci(
                 chat_request["responseFormat"] = cohere_body["response_format"]
             if "safety_mode" in cohere_body:
                 chat_request["safetyMode"] = cohere_body["safety_mode"].upper()
-            if "logprobs" in cohere_body:
-                chat_request["logprobs"] = cohere_body["logprobs"]
+            # Note: logprobs is not supported on OCI on-demand inference
             if "tool_choice" in cohere_body:
                 chat_request["toolChoice"] = cohere_body["tool_choice"]
             if "priority" in cohere_body: