clear-price-layer.jsx

(function (thisObj) {
  var counter = 0;
  var res = confirm(
    "This script removes all content from the layer named \"Preise\" use it at your own risk",
    true);
  if (!res) {
    return;
  } else {
    var doc;
    try {
      doc = app.activeDocument;
    } catch (e) {
      alert("You have no document");
    }
    var layers = doc.layers;
    for (var l = 0; l < layers.length; l++) {
      layer = layers[l];
      if (layer.name == 'Preise') {
        if (layer.locked === true) {
          layer.locked = false;
        }
        for (var i = layer.allPageItems.length - 1; i >= 0; i--) {
          var item = layer.allPageItems[i];
          if (item instanceof TextFrame) {
            //this should be a price label
            item.remove();
            counter++;
          }
        }

      }
    }
      alert("Removed " + counter + " items");
  }
})(this);