remove document history as git is already tracking

Author: lei-clari

README.md

@@ -70,18 +70,6 @@ Scala is an incredibly powerful language that is capable of many paradigms. We h
     - [Prefer URI over URL](#misc_uri_url)
 
 
-
-## <a name='history'>Document History</a>
-- 2015-03-16: Initial version.
-- 2015-05-25: Added [override Modifier](#override_modifier) section.
-- 2015-08-23: Downgraded the severity of some rules from "do NOT" to "avoid".
-- 2015-11-17: Updated [apply Method](#apply_method) section: apply method in companion object should return the companion class.
-- 2015-11-17: This guide has been [translated into Chinese](README-ZH.md). The Chinese translation is contributed by community member [Hawstein](https://github.com/Hawstein). We do not guarantee that it will always be kept up-to-date.
-- 2015-12-14:  This guide has been [translated into Korean](README-KO.md). The Korean translation is contributed by [Hyukjin Kwon](https://github.com/HyukjinKwon) and reviewed by [Yun Park](https://github.com/yunpark93), [Kevin (Sangwoo) Kim](https://github.com/swkimme), [Hyunje Jo](https://github.com/RetrieverJo) and [Woochel Choi](https://github.com/socialpercon). We do not guarantee that it will always be kept up-to-date.
-- 2016-06-15: Added [Anonymous Methods](#anonymous) section.
-- 2016-06-21: Added [Variable Naming Convention](#variable-naming) section.
-
-
 ## <a name='syntactic'>Syntactic Style</a>
 
 ### <a name='naming'>Naming Convention</a>