To remove an object from array with JavaScript MongoDB, we call update with the $pull operator.

For instance, we write

db.myCollection.update(
  { _id: ObjectId("5150a1199fac0e6910000002") },
  { $pull: { items: { id: 23 } } },
  false,
  true
);

to call update to get the element with object ID 5150a1199fac0e6910000002 and remove the item in items with _id 23 from each entry with $pull.

The 3rd argument is false means we disable upsert.

And the 4th argument is true means we do the operation on all items entries.