title: uitableview have a checkmark on edit mode when selected
body: <p>when I use edit mode in my tableView,I found there is a <strong>round check mark</strong> on the left.but i don't want it.<strong>how can i delete it</strong>?</p>
  
  <p>My <code>editingStyleForRowAtIndexPath</code> is <code>UITableViewCellEditingStyleNone</code></p>
  
  <pre><code>self.tableView.editing = YES;
  - (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
      return UITableViewCellEditingStyleNone;
  }
  </code></pre>
  
  <p>i already uncheck the "<strong>Show Selection on Touch</strong>" in xib.
  and i check the "<strong>Multiple Selection During Editing</strong>"</p>