title: How do you remove/delete a column in a custom list that you added from existing site columns?
body: <p>I have a custom list, and I've added a 'Page Image' field by clicking on the 'Add from existing site columns' link on the Settings page for the list. I would now like to remove the field, but clicking on the field name on the Settings page yields no 'Delete' functionality.</p>
  
  <p>How do you remove fields from a custom list in SharePoint that have been added via the 'Add from existing site columns' menu item?</p>