last minute addition of a simple fluid grid for our fluid examples; it needs work, so we're not documenting it now

less/variables.less

@@ -30,15 +30,6 @@
 @pink:                  #c3325f;
 @purple:                #7a43b6;
 
-// Grid system
-// Modify the grid styles in mixins.less
-@gridColumns:           12;
-@gridColumnWidth:       60px;
-@gridGutterWidth:       20px;
-@siteWidth:             (@gridColumns * @gridColumnWidth) + (@gridGutterWidth * (@gridColumns - 1));
-// Fluid width sidebar
-@fluidSidebarWidth:     220px;
-
 // Typography
 @baseFontSize:          13px;
 @baseFontFamily:        "Helvetica Neue", Helvetica, Arial, sans-serif;