Remove address validation code from documentation

- Replace Python validation functions with simple descriptions
- Keep validation rules (D prefix, 34 chars for DOGE; 4 prefix, 95/106 chars for XMR)
- Documentation should describe what, not show implementation how

docs/DOGECOIN.md

@@ -271,19 +271,8 @@ chown -R dogecoin:dogecoin /home/dogecoin/.dogecoin/
 ### Cold Storage Integration
 
 **Shop Configuration:**
-Each shop configures their own cold wallet address for automatic sweep destinations:
 
-```python
-def validate_dogecoin_address(address):
-    """Validate Dogecoin address format."""
-    if not address or len(address) != 34:
-        return False
-    if not address.startswith('D'):
-        return False
-    # Base58 character validation
-    valid_chars = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
-    return all(c in valid_chars for c in address)
-```
+Each shop configures their own cold wallet address through the web interface. The system validates Dogecoin addresses (must start with 'D' and be 34 characters) before accepting them.
 
 **Auto-Sweep System:**
 

docs/MONERO.rst

@@ -309,19 +309,8 @@ Cold Storage Integration
 ------------------------
 
 **Shop Configuration:**
-Each shop must configure their own cold wallet address for automatic sweep destinations:
 
-::
-
-    # Shop settings form validation
-    def validate_monero_address(address):
-        # Standard address validation
-        if len(address) == 95 and address.startswith('4'):
-            return True
-        # Integrated address validation  
-        if len(address) == 106 and address.startswith('4'):
-            return True
-        return False
+Each shop must configure their own cold wallet address for automatic sweep destinations through the web interface. The system validates Monero addresses (95 or 106 characters starting with '4').
 
 **Auto-Sweep System:**