Yes columns can be removed which are not required.

• To hide any columns which is not required, click on Customize button.
  
  

• Uncheck the column’s checkbox which you want to hide. It will immediately hide those columns.
  
  

• For ex- Exp Res and CssSelector columns are hidden now.
  
  

• After setting the columns, you can again click on Customize button to hide the column’s setting row.