diff --git a/src/parser/read-number.js b/src/parser/read-number.js
deleted file mode 100644
index 66891d31..00000000
--- a/src/parser/read-number.js
+++ /dev/null
@@ -1,32 +0,0 @@
-/**
- * Copyright (c) Baidu Inc. All rights reserved.
- *
- * This source code is licensed under the MIT license.
- * See LICENSE file in the project root for license information.
- *
- * @file 读取数字
- */
-
-
-var ExprType = require('./expr-type');
-var readUnaryExpr = require('./read-unary-expr');
-
-/**
- * 读取数字
- *
- * @inner
- * @param {Walker} walker 源码读取对象
- * @return {Object}
- */
-function readNumber(walker) {
-    var match = walker.match(/\s*([0-9]+(\.[0-9]+)?)/g, 1);
-
-    if (match) {
-        return {
-            type: ExprType.NUMBER,
-            value: +match[1]
-        };
-    }
-}
-
-exports = module.exports = readNumber;