tests: remove unused request for litellm async stream

tests/cassettes/test_litellm/test_litellm_async_stream_chat.yaml

@@ -1,62 +1,4 @@
 interactions:
-- request:
-    body: null
-    headers:
-      Accept:
-      - '*/*'
-      Accept-Encoding:
-      - identity
-      Connection:
-      - keep-alive
-      X-Amzn-Trace-Id:
-      - c36cfe8d-9ef6-4c18-b8d8-e849709d3e4a
-      user-agent:
-      - unknown/None; hf_hub/0.22.2; python/3.11.8
-    method: HEAD
-    uri: https://huggingface.co/mistral-small-latest/resolve/main/tokenizer.json
-  response:
-    body:
-      string: ''
-    headers:
-      Access-Control-Allow-Origin:
-      - https://huggingface.co
-      Access-Control-Expose-Headers:
-      - X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range
-      Connection:
-      - keep-alive
-      Content-Length:
-      - '29'
-      Content-Type:
-      - text/plain; charset=utf-8
-      Date:
-      - Tue, 16 Jul 2024 14:51:39 GMT
-      ETag:
-      - W/"1d-DMkJvg8tpLoaQbsiq9Mz7l2CJyI"
-      Referrer-Policy:
-      - strict-origin-when-cross-origin
-      Vary:
-      - Origin
-      Via:
-      - 1.1 a752e456797165fcc0a1e5de08b5353c.cloudfront.net (CloudFront)
-      WWW-Authenticate:
-      - Bearer realm="Authentication required", charset="UTF-8"
-      X-Amz-Cf-Id:
-      - Ik70s8EwrGQPLOSTUiGgDehItFLXGK5wZiEcZU2a5e68OOsc9ZceAQ==
-      X-Amz-Cf-Pop:
-      - AMS58-P3
-      X-Cache:
-      - Error from cloudfront
-      X-Error-Message:
-      - Invalid username or password.
-      X-Powered-By:
-      - huggingface-moon
-      X-Request-Id:
-      - Root=1-669688fb-691ad04c22e8006923f0b5e4;c36cfe8d-9ef6-4c18-b8d8-e849709d3e4a
-      cross-origin-opener-policy:
-      - same-origin
-    status:
-      code: 401
-      message: Unauthorized
 - request:
     body: '{"messages": [{"role": "user", "content": [{"type": "text", "text": "Hello
       World!"}]}], "max_tokens": 4096, "model": "claude-3-5-sonnet-20240620", "stream":