I have created a pivot table and from pivot table options I have selected the attribute column to be hidden. Unfortunately it still has a small grey area that I can't hide or make it blank.

I have used a static text with html <style>.PTCC {background-color:white;border-top:white;border-bottom:white;border-left:white;border-right:white}</style> that helped "disappear" the header of the column as you can see but can't extend it to disappear all default formatting for the hidden attribute. Could anyone help me with this?
Thanks