Removing reference to ERC6551Registry contract

Author: sullof

ERCS/erc-7656.md

@@ -153,11 +153,9 @@ These technical decisions collectively aim to broaden the scope and applicabilit
 
 ## Reference Implementation
 
-The reference implementation of `ERC7656Registry` is mutated from `ERC6551Registry`, with minor changes to rename over-specific functions, emit a different event and error, and a `supportsInterface` function that returns true only for the `IERC7656Registry` interfaceId.
-
 ```solidity
 contract ERC7656Registry is IERC7656Registry {
-// this implementation is mutated from https://github.com/erc6551/reference
+// this implementation is a variation of https://github.com/erc6551/reference
 
   function create(
     address implementation,