message: remove unused method `AccessPath::new_for_event()`
  Closes:
  Approved by: wqfish
diff: @@ -220,17 +220,6 @@ impl AccessPath {
  Self::new(address, ACCOUNT_RESOURCE_PATH.to_vec())
  }
  - /// Create an AccessPath for a ContractEvent.
  - /// That is an AccessPah that uniquely identifies a given event for a published resource.
  - pub fn new_for_event(address: AccountAddress, root: &[u8], key: &[u8]) -> Self {
  - let mut path: Vec<u8> = Vec::new();
  - path.extend_from_slice(root);
  - path.push(b'/');
  - path.extend_from_slice(key);
  - path.push(b'/');
  - Self::new(address, path)
  - }
  -
  /// Create an AccessPath to the event for the sender account in a deposit operation.
  /// The sent counter in LibraAccount.T (LibraAccount.T.sent_events_count) is used to generate
  /// the AccessPath.
  