Remove all the empty nodes from a JSON file using JavaScript

I am building an application in node.js that uses JSON files as project configs. I am using the ‘fs’ module to read the JSON file, which I then parse into a Javascript object. I then amend details within the object before using JSON.stringify to write the data back to the file.

How to completely remove an empty array in javascript

"floors": [
    {
        "floorName": "Grd Floor",
        "floorNotes": "",
        "floorPlan": "Buckley_Grd.jpg",
        "floorWidth": "57.392",
        "floorHeight": "20.776",
        "runs": [
            [],  *<----I cannot delete these*
            []   *<----only empty them*
            [
                {
                    "xCoOrd": "37.88235294117647",
                    "yCoOrd": "59.307359307359306",
                    "drawingType": "node"
                },
                {
                    "xCoOrd": "37.88235294117647",
                    "yCoOrd": "59.307359307359306",
                    "drawingType": "node"
                },
                {
                    "xCoOrd": "48.549019607843135",
                    "yCoOrd": "50",
                    "drawingType": "node"
                }
            ]   *<----I don't want to delete the elements in this array*
        ]
    }