Update txt file after clearing line in Qt

I am trying to update the text file after I cleared a line in the file. When I print after the clear the line is actually cleared but when I reopen the txt file the line is still there.
Here is the Code.

Code:

---

void myAccounts::on_removeB_clicked()
{
    myFile = new QFile("accountsDB.txt");
    if(!myFile->open(QIODevice::Text | QIODevice::ReadWrite))
        qDebug()<<"1!!"<<endl;
    else
     qDebug()<<"3!!"<<endl;
    stream= new QTextStream(myFile);
    QStringList list;
 
    while(!stream->atEnd())
    {
        line=stream->readLine();
        list = line.split(",");
        qDebug()<<ui->tableWidget->currentItem()->text()<<endl;
        qDebug()<<list[0]<<endl;
        qDebug()<<line<<endl;
 
        if(ui->tableWidget->currentItem()->text() == list[0] || ui->tableWidget->currentItem()->text() == list[1])
        {
            line.clear();
            qDebug()<<line<<endl;
            myFile->close();
        }
    }
        ui->tableWidget->removeRow(ui->tableWidget->currentRow());
}

---

I see no instruction to save the new content to the file.

You will have to read the whole file and hold that data in a temp variable, clear the file content, remove the line from the content, and write back the content with the line cleared.