style: fix lint

Author: vkarpov15

lib/schema/array.js

@@ -9,16 +9,6 @@ const $type = require('./operators/type');
 const MongooseError = require('../error/mongooseError');
 const SchemaType = require('../schematype');
 const CastError = SchemaType.CastError;
-const Types = {
-  Array: SchemaArray,
-  Boolean: require('./boolean'),
-  Date: require('./date'),
-  Number: require('./number'),
-  String: require('./string'),
-  ObjectId: require('./objectid'),
-  Buffer: require('./buffer'),
-  Map: require('./map')
-};
 const Mixed = require('./mixed');
 const cast = require('../cast');
 const get = require('../helpers/get');