Remove release dates. Use git tag instead

xerial · xerial · commit d9a472ddbc51 · 2015-06-23T18:06:37.000+09:00
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
@@ -1,28 +1,27 @@
 # Release Notes
 
-* 2015-06-23 0.7.0-M6
+* 0.7.0-M6
  * Add a prototype of Value implementation
  * Apply strict coding style
  * Several bug fixes
 
-* 2015-04-27 0.7.0-p9
+* 0.7.0-p9
  * Fix [#217](https://github.com/msgpack/msgpack-java/issues/217) when reading from SockectInputStream 
 
-* 2015-04-09 0.7.0-p8
+* 0.7.0-p8
  * Support Extension type (defined in MessagePack) in msgpack-jackson
  * Support BigDecimal type (defined in Jackson) in msgpack-jackson
  * Fix MessageUnpacker#unpackString [#215](https://github.com/msgpack/msgpack-java/pull/215), [#216](https://github.com/msgpack/msgpack-java/pull/216)
 
-* 2015-02-16 0.7.0-p7
+* 0.7.0-p7
  * Google App Engine (GAE) support
 
-* 2015-02-11 0.7.0-p6
+* 0.7.0-p6
  * Add MessagePacker.getTotalWrittenBytes()
 
-* 2015-01-28 0.7.0-p5
+* 0.7.0-p5
  * Fix skipValue [#185](https://github.com/msgpack/msgpack-java/pull/185)
 
-* 2015-01-19 0.7.0-p4
+* 0.7.0-p4
  * Supporting some java6 platform and Android
 
- 
