Revert "API v3 [WIP] (#6144)"

This reverts commit 28f2e9c356.

common/script/fns/predictableRandom.js

@@ -1,24 +1,20 @@
 import _ from 'lodash';
+/*
+Because the same op needs to be performed on the client and the server (critical hits, item drops, etc),
+we need things to be "random", but technically predictable so that they don't go out-of-sync
+ */
 
-// Because the same op needs to be performed on the client and the server (critical hits, item drops, etc),
-// we need things to be "random", but technically predictable so that they don't go out-of-sync
-
-module.exports = function predictableRandom (user, seed) {
+module.exports = function(user, seed) {
+  var x;
   if (!seed || seed === Math.PI) {
-    let stats = user.stats.toObject ? user.stats.toObject() : user.stats;
-    // These items are not part of the stat object but exists on the server (see controllers/user#getUser)
-    // we remove them in order to use the same user.stats both on server and on client
-    stats = _.omit(stats, 'toNextLevel', 'maxHealth', 'maxMP');
-
-    seed = _.reduce(stats, (accumulator, val) => {
-      if (_.isNumber(val)) {
-        return accumulator + val;
+    seed = _.reduce(user.stats, (function(m, v) {
+      if (_.isNumber(v)) {
+        return m + v;
       } else {
-        return accumulator;
+        return m;
       }
-    }, 0);
+    }), 0);
   }
-
-  let x = Math.sin(seed++) * 10000;
+  x = Math.sin(seed++) * 10000;
   return x - Math.floor(x);
 };