[gtk-doc] style: revert hiding the listing line numbers

[Stefan Kost <stefkost src gnome org>]

commit 7411c61ff1a1c6c9105569323eeb854da5328ba5
Author: Stefan Sauer <ensonic users sf net>
Date:   Thu Feb 27 18:23:58 2014 +0100

    style: revert hiding the listing line numbers
    
    We intensionally add them to listing so that they are shown and people can
    reference them from the docs.

 style/style.css |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/style/style.css b/style/style.css
index 048c881..1549359 100644
--- a/style/style.css
+++ b/style/style.css
@@ -451,11 +451,6 @@ acronym,abbr
   padding: 0.5em;
 }
 .listing_lines {
-  /* this just adds visual clutter and
-     takes precious room from small screens */
-  display: none;
-}
-.listing_lines {
   /* tango:sky blue 0.5 */
   background: #a6c5e3;
   background: rgba(114, 159, 207, 0.2);