Refine system prompt instructions by removing unnecessary guidance on admitting uncertainty and generating code.

main.py

@@ -356,10 +356,7 @@ def get_system_prompt() -> str:
         "Formatting: Use Discord Markdown as needed. Be brief. Remember that we are chatting, so you should not write a wall of text.\n"
         "You can recall recent messages from only the current channel (~last 10 minutes, up to ~50 turns).\n"
         "Be brief and to the point. Use as few words as possible.\n"
-        "If you are unsure about something, admit it rather than making up an answer.\n"
         "Avoid unnecessary filler words and phrases.\n"
-        "If you are asked to generate code, provide only the code block without any additional text.\n"
-        "Never mention that you are an AI model or language model.\n"
         "Only use web search results if they are relevant to the user's query.\n"
     )