Remove layers added by ol-geocoder seach

app.js

function remove_search_marker() {
  var remove_layer_name = 'geocoder-layer';
  var layers_to_remove = [];
  map.getLayers().forEach(function(layer) {
    var layer_name = layer.getProperties().name;
    if (layer_name && layer_name.match(remove_layer_name)) {
      layers_to_remove.push(layer);
    }
  });

  for (var i = 0; i < layers_to_remove.length; i++) {
    map.removeLayer(layers_to_remove[i]);
  }
}