Remove added layer

[tmamedzadeh]

Is there a way to remove the added layer, without removing other polygons and markers?

[johnd0e]

Sure there is.
The easiest method is using Layers control.

  var layerswitcher = L.control.layers().addTo(map);
  var control = L.Control.fileLayerLoad().addTo(map);

  control.loader.on('data:loaded', function (e) {
    layerswitcher.addOverlay(e.layer, e.filename);
  });