Revert "Add hooks: action:post.favourite and action:post.unfavourite"

This reverts commit 1d22a2d46b.

src/favourites.js

@@ -307,12 +307,6 @@ var async = require('async'),
 					results.postData.reputation = count;
 					posts.setPostField(pid, 'reputation', count, next);
 				},
-				function(next) {
-					plugins.fireHook('action:post.' + type, {
-						pid: pid,
-						uid: uid,
-					}, next);
-				},
 				function(next) {
 					next(null, {
 						post: results.postData,