If you have a menu item with type “Category List” then it’s under the Basic Parameters options. More on this click here

Unfortunately there isn’t an easy option for this yet in type “Section Layout”. To remove the Article Filtering option you need to do some code modifications.

  1. Locate the following filecomponents\com_content\views\category\tmpl\default_items.php
  2. Replace the following line  with  it should be on line 16
  3. Save the file
  4. Reload the page and the problem should be solved.

NOTE: Maybe in future this will be possible via the Joomla! Administrator backend. When article was published our current Joomla! version was 1.5.10