Mass removing background using photoshop script

Hello there

Need help with this script:

var sourceFolder = Folder("C:\\ps\\src");

  if (sourceFolder != null)
  {
     var fileList = sourceFolder.getFiles();
	 //comment the above line and uncomment the following line to filter specific file types. the script will not work if you have any non-image file in the src folder so try filtering files types if the script fails.
	 // var fileList = sourceFolder..getFiles(/\.(jpg|tif|psd|crw|cr2|nef|dcr|dc2|raw|heic)$/i);
  }

for(var a = 0 ;a < fileList.length; a++){
    
app.open(fileList[a]);

// Select subject
var idautoCutout = stringIDToTypeID( "autoCutout" );
var desc01 = new ActionDescriptor();
var idsampleAllLayers = stringIDToTypeID( "sampleAllLayers" );
desc01.putBoolean( idsampleAllLayers, false );
try{
executeAction( idautoCutout, desc01, DialogModes.NO );
}
catch(err){}
// Invert the selection

app.activeDocument.selection.invert();

// Create a color to be used with the fill command

var colorRef = new SolidColor

colorRef.rgb.red = 0

colorRef.rgb.green = 0

colorRef.rgb.blue = 0



// Now apply fill to the current selection

app.activeDocument.selection.fill(colorRef)


//enter path for where you want the file saved
var saveFolder = new Folder("C:\\ps\\out"); 

var fileName = app.activeDocument.name.replace(/\.[^\.]+$/, ''); 
sfwPNG24 (new File(saveFolder +'/' + fileName + '.png'),12);
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
//fileList[a].remove();
 }

function sfwPNG24(saveFile){

var pngOpts = new PNGSaveOptions;

pngOpts.transparency = true

pngOpts.compression = 9;

pngOpts.interlaced = false;

activeDocument.saveAs(saveFile, pngOpts, true, Extension.LOWERCASE);

}

Right now script works and it saves files from folder to .png

But i need a transparent background for my images..

Need something that can delete selected pixels after this:

app.activeDocument.selection.invert();

In Photoshop there is button "Delete" (Edit -> Clear), when you press this it deletes pixels in selected area. I need this in script. How to do this?

Maybe i need somehow to simulate