Remove the Renounce Ownership functionality

Now, let's remove the function to remove an owner. We simply stop this with a revert. Add the following function to the SharedWallet:

contract SharedWallet is Allowance {

    //...

    function renounceOwnership() public override onlyOwner {
        revert("can't renounceOwnership here"); //not possible with this smart contract
    }

    //...
}

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Last update: April 29, 2022