Remove commented-out code

src/config.rs

@@ -74,8 +74,6 @@ pub struct Config<'a> {
 
     /// Ranges of lines which should be highlighted with a special background color
     pub highlighted_lines: HighlightedLineRanges,
-    ///// Names of files to display when printing
-    // pub filenames: Option<Vec<&'a str>>,
 }
 
 #[test]