thumbnails cleanup: no more UL or LI elements needed, instead just use standard grid markup

less/thumbnails.less

@@ -3,26 +3,6 @@
 // --------------------------------------------------
 
 
-// Note: `.thumbnails` and `.thumbnails > li` are overriden in responsive files
-
-// Make wrapper ul behave like the grid
-.thumbnails {
-  margin-left: -@gridGutterWidth;
-  list-style: none;
-  .clearfix();
-}
-// Fluid rows have no left margin
-.row-fluid .thumbnails {
-  margin-left: 0;
-}
-
-// Float li to make thumbnails appear in a row
-.thumbnails > li {
-  float: left; // Explicity set the float since we don't require .span* classes
-  margin-bottom: @baseLineHeight;
-  margin-left: @gridGutterWidth;
-}
-
 // The actual thumbnail (can be `a` or `div`)
 .thumbnail {
   display: block;