[E&A] Pulls out mention of default LLM from AI assistant docs (elastic#1037)

## Overview

As title states.

Author: szabosteve

explore-analyze/ai-assistant.md

@@ -24,7 +24,7 @@ $$$token-limits$$$
 - **Visualizing and analyzing data**: Assists you in creating visualizations and analyzing your data using Kibana.
 - **Troubleshooting**: Explains errors, messages, and suggests remediation.
 
-AI Assistant requires specific privileges and a generative AI connector (if not using the default Elastic LLM).
+AI Assistant requires specific privileges and a generative AI connector.
 
 % Check [Configure AI Assistant](../deploy-manage/) for more details on how to enable and configure it.