remove unused cheatsheets

languages/lua.lua

@@ -1,24 +0,0 @@
-------------------------------------------------------------------------------
--- LUA (5.3+) CHEATSHEET (中文速查表） - by skywind (created on 2018/03/18)
--- Version: 1, Last Modified: 2018/03/18 20:59
--- https://github.com/skywind3000/awesome-cheatsheets
-------------------------------------------------------------------------------
-
-
-------------------------------------------------------------------------------
--- 语言基础
-------------------------------------------------------------------------------
-
-print("Hello, World !!")           -- 基本输出
-print("Hi" .. " You !!")           -- 字符串链接
-print(type(''))                    -- 输出变量类型
-
-------------------------------------------------------------------------------
--- 字符串处理
-------------------------------------------------------------------------------
-
-
-------------------------------------------------------------------------------
--- 文件操作
-------------------------------------------------------------------------------
-io.lines(filename)                 -- 直接读取行