Remove unnecessary return statements

These statements were automatically added by CoffeeScript.

I'm only removing the obvious cases; there might be more cases where the
`return` statement isn't necessary.

app/assets/javascripts/table_sortable.js

@@ -1,4 +1,3 @@
-// Generated by CoffeeScript 1.12.6
 (function() {
   "use strict";
   App.TableSortable = {
@@ -18,7 +17,7 @@
       };
     },
     initialize: function() {
-      return $("table.sortable th").click(function() {
+      $("table.sortable th").click(function() {
         var rows, table;
         table = $(this).parents("table").eq(0);
         rows = table.find("tbody tr").toArray().sort(App.TableSortable.comparer($(this).index()));