Remove app, remove syncMixin; wrapSync now takes an auth parameter.

@@ -32,12 +32,12 @@ define(function(require) {
         return deferred;
     }
 
-    var authSync = function authSync(origSync, method, model, options) {
+    var authSync = function authSync(auth, origSync, method, model, options) {
         var args = _.toArray(arguments);
         args.shift();
         var url = options.url || _.result(model, 'url');
         if (url) {
-            var sessionId = app.get('auth').get('sessionId');
+            var sessionId = auth.get('sessionId');
             if (sessionId) {
                 options.url = url + (url.indexOf('?') == -1 ? '?' : '&') + 'sessionId=' + sessionId;
             }
@@ -268,15 +268,11 @@ define(function(require) {
     }, {
         FacebookProvider: FacebookProvider,
         FormProvider: FormProvider,
-        wrapSync: function(origSync) {
+        wrapSync: function(auth, origSync) {
             return function() {
-                return authSync.apply(this, [origSync].concat(_.toArray(arguments)));
+                return authSync.apply(this, [auth, origSync].concat(_.toArray(arguments)));
             };
         },
-        syncMixin: function(Class) {
-            Class.prototype.sync = Auth.wrapSync(Class.prototype.sync);
-            return Class;
-        },
     });
     return Auth;
 });