test: remove outdated test case for optional fields in ChatCompletionResponse

Author: Vein05

responseHandler_test.go

@@ -68,70 +68,6 @@ func TestHandleChatCompletionResponse(t *testing.T) {
 			},
 			want: &validResponse,
 		},
-		{
-			name: "response with optional fields",
-			response: &http.Response{
-				StatusCode: http.StatusOK,
-				Body: io.NopCloser(bytes.NewReader([]byte(`{
-					"id": "chat-123",
-					"object": "chat.completion",
-					"created": 1677858242,
-					"model": "deepseek-chat",
-					"choices": [{
-						"index": 0,
-						"message": {
-							"role": "assistant",
-							"content": "Hello!",
-							"reasoning_content": "User greeting"
-						},
-						"logprobs": {
-							"tokens": ["Hello", "!"],
-							"token_logprobs": [-0.5, -0.2],
-							"top_logprobs": [{"Hello": -0.5}, {"!": -0.2}]
-						},
-						"finish_reason": "stop"
-					}],
-					"usage": {
-						"prompt_tokens": 5,
-						"completion_tokens": 2,
-						"total_tokens": 7,
-						"prompt_cache_hit_tokens": 3,
-						"prompt_cache_miss_tokens": 2
-					},
-					"system_fingerprint": "fp-123"
-				}`))),
-			},
-			want: &deepseek.ChatCompletionResponse{
-				ID:      "chat-123",
-				Object:  "chat.completion",
-				Created: 1677858242,
-				Model:   "deepseek-chat",
-				Choices: []deepseek.Choice{
-					{
-						Index: 0,
-						Message: deepseek.Message{
-							Role:             "assistant",
-							Content:          "Hello!",
-							ReasoningContent: "User greeting",
-						},
-						LogProbs: &deepseek.LogProbs{
-							Tokens:        []string{"Hello", "!"},
-							TokenLogProbs: []float64{-0.5, -0.2},
-							TopLogProbs:   []map[string]float64{{"Hello": -0.5}, {"!": -0.2}},
-						},
-						FinishReason: "stop",
-					},
-				},
-				Usage: deepseek.Usage{
-					PromptTokens:          5,
-					CompletionTokens:      2,
-					TotalTokens:           7,
-					PromptCacheHitTokens:  3,
-					PromptCacheMissTokens: 2,
-				},
-				SystemFingerprint: func(s string) *string { return &s }("fp-123"),
-			},
-		},
 		{
 			name: "invalid JSON",
 			response: &http.Response{