fixed topic thumbs

src/posts.js

@@ -2,9 +2,7 @@ var db = require('./database'),
 	utils = require('./../public/src/utils'),
 	user = require('./user'),
 	topics = require('./topics'),
-	categories = require('./categories'),
 	favourites = require('./favourites'),
-	threadTools = require('./threadTools'),
 	postTools = require('./postTools'),
 	categories = require('./categories'),
 	plugins = require('./plugins'),