Revert "Start down path of adding better error msg for apps updating …

…to sails-hook-grunt@4 (but will revert because theres no obvious clean way of doing this that doesnt make it harder to continue using JST/coffee yourself)"

This reverts commit 5db5366.

accessible/load-grunt-tasks.js

@@ -30,13 +30,6 @@ var includeAll = require('include-all');
  */
 module.exports = function loadGruntTasks (appPath, grunt){
 
-  // Verify that reviously-built-in-but-no-longer-included-by-default Grunt plugins:
-  // ========================================================
-  var NO_LONGER_BUILT_IN_GRUNT_PLUGINS = [
-    'grunt-contrib-jst',
-    'grunt-contrib-coffee'
-  ];
-
 
   // Load built-in Grunt plugins.
   // ========================================================