Remove Data Protection section from README

Removed Data Protection section and related details from README.

Author: JiaDe-Wu

README.md

@@ -306,23 +306,6 @@ Uses SiliconFlow (DeepSeek, Qwen, GLM) instead of Bedrock. Requires a SiliconFlo
 
 ---
 
-### Data Protection
-
-```yaml
-EnableDataProtection: false  # Default: data deleted with stack
-  # When true:
-  # - Data volume retained on stack delete
-  # - Preserves chat history, configs, credentials
-  # - Allows instance replacement without data loss
-  
-  # When false:
-  # - Data volume deleted with stack (clean removal)
-```
-
-**Storage layout:**
-- Root volume (30GB): OS, applications, and OpenClaw data (default)
-- Data volume (30GB): `/data` → symlinked to `~/.openclaw` (when EnableDataProtection=true)
-
 ## Security
 
 | Layer | What it does |