Update README.md

standards/ICRC-3/README.md

@@ -6,8 +6,6 @@
 
 `ICRC-3` is a standard for accessing the block log of a Ledger on the [Internet Computer](https://internetcomputer.org).
 
-A Block contains a Transaction. Transactions are an enumeration of different types of operation (e.g. burn, mint, transfer, approve, ....).
-
 `ICRC-3` specifies:
 1. A generic format for sharing the block log without information loss. This includes the fields that a block must have
 2. A mechanism to verify the block log on the client side to allow downloading the block log via query calls
@@ -399,4 +397,4 @@ service : {
 service : {
     icrc3_supported_block_types : () -> (vec record { block_type : text; url : text }) query;
 };
-```
+```