Remove old wrapping css

Browsers this old are already hilariously broken, so we don't need these fallbacks.

Author: mattico

src/theme/book.css

@@ -1367,11 +1367,7 @@ html:not(.sidebar-visible) #menu-bar:not(:hover).folded > #menu-bar-sticky-conta
   pre,
   code {
     page-break-inside: avoid;
-    white-space: pre-wrap /* CSS 3 */;
-    white-space: -moz-pre-wrap /* Mozilla, since 1999 */;
-    white-space: -pre-wrap /* Opera 4-6 */;
-    white-space: -o-pre-wrap /* Opera 7 */;
-    word-wrap: break-word /* Internet Explorer 5.5+ */;
+    white-space: pre-wrap;
   }
   .fa {
     display: none !important;

src/theme/stylus/print.styl

@@ -47,11 +47,7 @@
 
     pre, code {
         page-break-inside: avoid
-        white-space: pre-wrap       /* CSS 3 */
-        white-space: -moz-pre-wrap  /* Mozilla, since 1999 */
-        white-space: -pre-wrap      /* Opera 4-6 */
-        white-space: -o-pre-wrap    /* Opera 7 */
-        word-wrap: break-word       /* Internet Explorer 5.5+ */
+        white-space: pre-wrap
     }
 
     .fa {