possible to delete a mongodb catch block

I have updated my mongodb driver which forces me to use two completion blocks: .then() .catch() instead of a single callback. The consequence of this is that any error in my stack down the line will jump back up to the mongodb .catch() and potentially cascade processes all over again. Any 'done' block should only be called once. Code that was once easily traceable and was called only once has lost it's simplicity and coherence when migrating from a single callback to two blocks: then() and catch().
DB.insertOne(something).then( (r) =>
{
done({success:true});
}).catch( (e) =>
{
done({success:false, message:e.code});
});



My question - is it possible to delete the catch block, once the insert command has successfully completed? I want to do this because I do not want the mongodb .catch() block executing when irrelevant and unrelated events crash occur down the line. I am looking for something like this.
DB.insertOne(something).then( (r) =>
{
delete this.catch;//does not work
done({success:true});
}).catch( (e) =>
{
done({success:false, message:e.code});
});



note also that I do need the catch block in general. I need the catch block to execute once - for example if the insert command were to return an error for attempting to insert the same document with the same ._id (for example).