Illustrator script to delete the layers that contain selected objects

@Rob.Wood I may be late to the game with your question but I think this script might accomplish what you are looking for.

// Script to Delete Layers Containing Selected Objects
(function () {
    // Check if there is an active document
    if (app.documents.length > 0) {
      // Get the active document
      var doc = app.activeDocument;
      
      // Get the selected objects
      var selectedObjects = doc.selection;
      
      // Check if there are selected objects
      if (selectedObjects.length > 0) {
        // Loop through all layers in reverse order
        for (var i = doc.layers.length - 1; i >= 0; i--) {
          var layer = doc.layers[i];
          
          // Check if any selected object is on this layer
          var deleteLayer = false;
          for (var j = 0; j < selectedObjects.length; j++) {
            if (selectedObjects[j].layer == layer) {
              deleteLayer = true;
              break;
            }
          }
          
          // If the layer should be deleted, remove it
          if (deleteLayer) {
            layer.remove();
          }
        }
        
        // Alert when the process is completed
        alert("Selected objects' layers have been deleted.");
      } else {
        // No selected objects found
        alert("No objects are currently selected.");
      }
    } else {
      // No active document found
      alert("No active document found.");
    }
  })();
  

Hope this Helps!
 

Are you talking about main layers only or about some more nested constructions?