How to remove xmp metadata?

A little late but here's a version for batch processing. It is a combination of Paul Riggott  code and another one in the forum.

#target photoshop 
    
// Use folder selection dialogs to get the location of the input files
// and where to save the new output files.

var topFolder = Folder.selectDialog ("Où se trouvent les images à convertir?.", Folder.desktop);
var fileandfolderAr = scanSubFolders(topFolder,/\.(jpg|tif|psd|bmp|gif|png|eps)$/i);
var fileList = fileandfolderAr[0];

for (var i = 0; i < fileList.length; i++){
    if(!fileList.toString().match(/\.DS_Store|\.BridgeSort/g)){

        var f = fileList;


        removeMetadata(f);  
        function removeMetadata( file){  
        if ( !ExternalObject.AdobeXMPScript ) ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');  
                var xmpf = new XMPFile( File(file).fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_UPDATE );  
                var xmp = xmpf.getXMP();  
                XMPUtils.removeProperties(xmp, "", "", XMPConst.REMOVE_ALL_PROPERTIES);  
              if (xmpf.canPutXMP( xmp )) {  
                 xmpf.putXMP( xmp );  
              }  
              xmpf.closeFile( XMPConst.CLOSE_UPDATE_SAFELY );  
        };
    }
}



//https://forums.adobe.com/message/5470274
function scanSubFolders(tFolder, mask) { // folder object, RegExp or string
    var sFolders = new Array();
    var allFiles = new Array();
    sFolders[0] = tFolder;
    for (var j = 0; j < sFolders.length; j++){ // loop through folders            
        var procFiles = sFolders.getFiles();
        for (var i=0;i<procFiles.length;i++){ // loop through this folder contents
            if (procFiles instanceof File ){

                if(mask==undefined) allFiles.push(procFiles);// if no search mask collect all files

                if (procFiles.fullName.search(mask) != -1) allFiles.push(procFiles); // otherwise only those that match mask

        }else if (procFiles instanceof Folder){

            sFolders.push(procFiles);// store the subfolder

            scanSubFolders(procFiles, mask);// search the subfolder

         }
      }
   }
   return [allFiles,sFolders];
};