How to remove a document from a collection using Mongodb aggregation?

Question

I have two collections. Locations and Archiveloc. I would like to enter a specific document in archiveloc from locations after going through some conditions. And then this particular document must be removed from the Locations collection after it is submitted to Archiveloc. I can transfer documents to Archiveloc, but I cannot delete them from the Locations collection. Below is my code

locations.aggregate([
        {
            $sort: {
                createdAt: -1
            }
                },
        {
            $group: {

                _id: '$imei',
                total_imei: {
                    $sum: 1,


                },

                "firstDoc": {
                    "$first": "$_id",

                },
                object: {
                    $push: "$$ROOT",


                },


            }
                },



        {
            $match: {

                total_imei: {
                    $gt: 2
                }
            }
                },

        {
            $out: "archiveloc",

                        }



    ].exec(function (e, d) {
        console.log(d);
        d.forEach(function (data) {

            console.log(data);
            // return temp;
            // console.log(temp);


        });

    }));

Quick help would be greatly appreciated. Thank you in advance.

For testing purposes, an example of documents is provided:

For a collection called Locations:

{
"_id" : ObjectId("57010cde76fe39110d716ad0"),
"sourcedevice" : "tcpping",
"imei" : "86669902366722",
"commandtype" : "AAA",
"latitude" : "0.41995433112606406",
"longitude" : "0.43301976611837745",
"datetime" : ISODate("2016-04-03T12:30:22.401Z"),
"status" : "A",
"mileage" : "10418109",
"run_time" : "12854934",
"base_station_info" : "470|1|61E0|43C4",
"io_port_status" : "0000",
"analog_input" : "0000|0000|0000|02D3|010A",
"increment_index" : 1459686622401.0000000000000000,
"__v" : 0}

Documents for the Archiveloc collection:

{
"_id" : "86669902366722",
"total_imei" : 45,
"firstDoc" : ObjectId("57010cde76fe39110d716ad0"),
"object" : [ 
    {
        "_id" : ObjectId("57010cde76fe39110d716ad0"),
        "sourcedevice" : "tcpping",
        "imei" : "86669902366722",
        "commandtype" : "AAA",
        "latitude" : "0.41995433112606406",
        "longitude" : "0.43301976611837745",
        "direction" : "83",
        "horizaontal_accuracy" : "0.8",
        "altitude" : "6",
        "mileage" : "10418109",
        "run_time" : "12854934",
        "base_station_info" : "470|1|61E0|43C4",
        "io_port_status" : "0000",
        "analog_input" : "0000|0000|0000|02D3|010A",
        "increment_index" : 1459686622401.0000000000000000,
        "__v" : 0
    }
]}