Remove unnecessary definitions

lib/model.js

@@ -40,10 +40,7 @@ module.exports = (function() {
       schemaDelimiter: '',
       schemaDelimiter: '',
       defaultScope: null,
       defaultScope: null,
       scopes: null,
       scopes: null,
-      hooks: {
-        beforeCreate: [],
-        afterCreate: []
-      }
+      hooks: {}
     }, options || {});
     }, options || {});
 
 
     this.associations = {};
     this.associations = {};