Fix invalid return value from vault module in README.md.

There was a duplicate table for the return values in the vault module,
the invalid one was removed.

README-vault.md

@@ -244,10 +244,6 @@ ipavault
 
 There is only a return value if `state` is `retrieved`.
 
-Variable | Description | Returned When
--------- | ----------- | -------------
-`data` | The data stored in the vault. | If `state` is `retrieved`.
-
 Variable | Description | Returned When
 -------- | ----------- | -------------
 `vault` | Vault dict with archived data. (dict) <br>Options: | If `state` is `retrieved`.