refactor: remove redundant env var setting, add DeepSeek to docs

README.md

@@ -306,6 +306,7 @@ Config file: `~/.nanobot/config.json`
 | `openrouter` | LLM (recommended, access to all models) | [openrouter.ai](https://openrouter.ai) |
 | `anthropic` | LLM (Claude direct) | [console.anthropic.com](https://console.anthropic.com) |
 | `openai` | LLM (GPT direct) | [platform.openai.com](https://platform.openai.com) |
+| `deepseek` | LLM (DeepSeek direct) | [platform.deepseek.com](https://platform.deepseek.com) |
 | `groq` | LLM + **Voice transcription** (Whisper) | [console.groq.com](https://console.groq.com) |
 | `gemini` | LLM (Gemini direct) | [aistudio.google.com](https://aistudio.google.com) |
 

nanobot/providers/litellm_provider.py

@@ -107,10 +107,6 @@ class LiteLLMProvider(LLMProvider):
         if "gemini" in model.lower() and not model.startswith("gemini/"):
             model = f"gemini/{model}"
         
-        # Force set env vars for the provider based on model
-        if "deepseek" in model:
-            os.environ["DEEPSEEK_API_KEY"] = self.api_key
-        
         kwargs: dict[str, Any] = {
             "model": model,
             "messages": messages,