Deprecate fields

ecosystem/sep-0006.md

@@ -943,7 +943,7 @@ All assets listed in a `deposit` and `deposit-exchange` can contain these attrib
 
 * `enabled`: `true` if SEP-6 deposit for this asset is supported
 * `authentication_required`: Optional. `true` if client must be [authenticated](#authentication) before accessing the deposit endpoint for this asset. `false` if not specified.
-* `fields` object as explained below.
+* `fields` **Deprecated**. KYC information should be supplied to the Anchor via SEP-12. `fields` object is explained below.
 
 Deposit assets listed in the `deposit` object can also contain the attributes: