Revert "Aggiungere LLM Providers (#48)" (#51)

This reverts commit 6ff2fcc2a7.

configs.yaml

@@ -19,18 +19,6 @@ models:
       label: Gemini
     # - name: gemini-2.0-pro # TODO Non funziona, ha un nome diverso
     #   label: Gemini Pro
-  gpt:
-    - name: gpt-4o
-      label: OpenAIChat
-  deepseek:
-    - name: deepseek-chat
-      label: DeepSeek
-  xai:
-    - name: grok-3
-      label: xAI
-  mistral:
-    - name: mistral-large-latest
-      label: Mistral
   ollama:
     - name: gpt-oss:latest
       label: Ollama GPT