How do I delete a topic?
Go to Forums.
Select the Forums tool from the Tool Menu of your site.
Select Delete Topic from the drop-down menu.
Click the More link next to the topic you want to delete, then chose the Delete Topic option from the drop-down menu.
You can also click on the title of a topic to select it.
Topics are indented underneath each of the forums. Click on the title of a topic to enter that topic.
You will be prompted to confirm the deletion. If you are sure that you want to delete the topic and all of the messages within it, click the Delete Topic button.