Release.md - Remove version change instrcution

The version change instruction is obsolete with the change
that maven pulls versioning information from version.h.

java/RELEASE.md

@@ -41,8 +41,6 @@ Set ~/.m2/settings.xml to contain:
       </servers>
     </settings>
 
-Then update rocksjni.pom's version tag to reflect the release version.
-
 From RocksDB's root directory, first build the Java static JARs:
 
     make jclean clean rocksdbjavastaticpublish