Remove implicit empty candy machine test

[febo]

This PR removes the implicit candy machine empty test to prevent the bot tax to be activated if a transaction is executed after all items have been minted. In order to explicitly add the empty test, the redeemed amount guard can be used:

"redeemedAmount" : {
    "maximum": number,
}

In this case, the maximum should be set to be value of items available (e.g., 100 if there are 100 items in the candy machine). After 100 items are minted, the guard will prevent any further transactions to reach the candy machine and the bot tax will apply if the bot tax guard is enabled.