refactor: simplify OpenAI and Ollama summarizer implementations

cmd/acb/summarize.go

@@ -33,37 +33,19 @@ func (o *OpenAISummarizer) Summarize(fullPrompt string, openaiEndpoint string, o
 		return "", fmt.Errorf("OpenAI endpoint or token not set")
 	}
 
-	// Create a JSON payload for the OpenAI API
-	payload := struct {
-		Model    string `json:"model"`
-		Messages []struct {
-			Role    string `json:"role"`
-			Content string `json:"content"`
-		} `json:"messages"`
-	}{
-		Model: openaiModel,
-		Messages: []struct {
-			Role    string `json:"role"`
-			Content string `json:"content"`
-		}{{Role: "system", Content: fullPrompt}},
-	}
-
 	// Create a POST request to the OpenAI endpoint with JSON body
-	req, err := api.GenerateRequest{
+	req := api.GenerateRequest{
 		Model:  openaiModel,
 		Prompt: fullPrompt,
 		Stream: nil,
 	}
-	if err != nil {
-		return "", err
-	}
 
 	// Use the Ollama client to generate the response
 	ctx := context.Background()
-	client := api.ClientFromEnvironment()
+	client, _ := api.ClientFromEnvironment()
 
 	var result string
-	err = client.Generate(ctx, &req, func(resp api.GenerateResponse) error {
+	err := client.Generate(ctx, &req, func(resp api.GenerateResponse) error {
 		result += resp.Response
 		return nil
 	})
@@ -86,7 +68,7 @@ func (o *OllamaSummarizer) Summarize(fullPrompt string, ollamaEndpoint string, o
 
 	// Create the request
 	ctx := context.Background()
-	client := api.ClientFromEnvironment()
+	client, _ := api.ClientFromEnvironment()
 
 	req := &api.GenerateRequest{
 		Model:  ollamaModel,