Delete component print-none.

assets/sass/components/print-none/_print-none.scss

@@ -1,14 +0,0 @@
-// Do not print
-//
-// Removes an element from the print version of the web site.
-//
-// By importing these CSS rules in a file marked as media "all", we allow these
-// print rules to be aggregated with other stylesheets, for improved front-end
-// performance.
-
-.print-none,
-%print-none {
-  @media print {
-    display: none;
-  }
-}

assets/sass/print.scss

@@ -1,7 +1,6 @@
 // The print stylesheet for this theme.
 
 @import 'init';
-@import 'components/print-none/print-none';
 
 .pager,
 %pager,
@@ -9,7 +8,7 @@
 aside,
 nav,
 footer {
-  @extend %print-none;
+  display: none;
 }
 
 @media print {