remove duplicated information from release instructions

ReleaseInstructions

@@ -376,39 +376,6 @@ https://www.apache.org/dev/#releases
 https://commons.apache.org/releases/index.html
 https://wiki.apache.org/commons/SigningReleases
 
-Files containing version information
-------------------------------------
-
-   * manual/cover.html
-   * manual/credits.html
-   * build.xml properties : project.version,manifest-version,pom.version
-   * POM files under src/etc/poms and subdirectories
-   * ivy.xml in release subdirectory
-   * WHATSNEW
-   * src/etc/testcases/taskdefs/conditions/antversion.xml
-   * snap/snapcraft.yaml
-
-cover.html, credits.html, POM files, antversion.xml should be 
-adjusted for the [newversion] right after the build and tagging 
-of the release
-
-build.xml
----------
-
-  right before a release :
-
-    the project.version gets bumped to the exact release
-    number, for instance 1.9.5
-
-  right after a release :
-
-    project.version property in build.xml gets bumped to
-    [newversion]alpha, for example 1.9.6alpha
-
-    manifest-version gets bumped to the exact next release number
-    for example 1.9.6
-
-    pom.version gets bumped to [newversion]-SNAPSHOT