title: Remove attribute value from product
body: <p>We have attributes with a default value, even if the attribute is not in the products attribute set, the default value for these products are shown in layered navigation.   </p>
  
  <p>Example
  My keyboards category gets Mouse attributes shown in layered navigation with the default attribute value. So all my keyboards get "Right handed".  </p>
  
  <p>How can i remove the attribute value for these products ?</p>