Bulk remove messages

nukem.js

var sub = 'insert-sub-internal-code-here';

var mb = new MsgBase(sub);
if (!mb.open()) throw new Error(mb.errror);
var headers = mb.get_all_msg_headers();
Object.keys(headers).forEach(function (e) {
    var n = parseInt(e, 10);
    if (system.trashcan('subject', headers[e].subject)) {
        writeln('Removing message ' + n + ', "' + headers[e].subject + '" matched subject filter.');
        mb.remove_msg(n);
    }
});
mb.close();