Remove newer versions from changelog (#61)

Changelog entries now in GitHub for those releases

CHANGELOG.md

@@ -1,59 +1,5 @@
 # Changelog
 
-## Version 2.5 (Jun 24, 2019)
-
--   Requires Jenkins 2.121.1 or later.
--   New feature: `addHtmlBadge` is available [JENKINS-57917](https://issues.jenkins.io/browse/JENKINS-57917) -
-
-    ``` syntaxhighlighter-pre
-    manager.addHtmlBadge('<i>Italic text</i>');
-    ```
-
--   groovy-postbuild no longer requires Overall/Administer permission: [JENKINS-54262](https://issues.jenkins.io/browse/JENKINS-54262) - It caused problems when used with [Authorize Project plugin](https://plugins.jenkins.io/authorize-project/)
--   Suppress "WARNING: Avoid calling getLogFile on ..." when used in pipeline jobs.
-
-## Version 2.4.3 (Nov 18, 2018)
-
--   FIX: removeSummary / removeSummaries doesn't work (throw UnsupportedOperationException) ([JENKINS-54184](https://issues.jenkins.io/browse/JENKINS-54184))
-
-## Version 2.4.2 (Aug 8, 2018)
-
--   FIX: removeBadge / removeBadges doesn't work (throw UnsupportedOperationException) ([JENKINS-52043](https://issues.jenkins.io/browse/JENKINS-52043))
-
-## Version 2.4.1 (May 4, 2018)
-
--   Have [Build Monitor Plugin](https://plugins.jenkins.io/build-monitor-plugin/) not cause errors.
-    ([JENKINS-50420](https://issues.jenkins.io/browse/JENKINS-50420))
-    -   Introduced fake `GroovyPostbuildAction`.
-    -   The feature of build-monitor to cooperate with groovy-postbuild doesn't work yet. It requires an upcoming release of build-monitor plugin to have it work again.
-
-## Version 2.4 (Mar 25, 2018)
-
--   Requires Jenkins 2.60.3 or later
--   Extract badge and summary features to [Badge plugin](https://plugins.jenkins.io/badge)
-    ([JENKINS-43992](https://issues.jenkins.io/browse/JENKINS-43992)).
-    -   You can use badge and summary features in pipeline only with badge-plugin. See [Badge Plugin](https://plugins.jenkins.io/badge/) for more details.
--   Sanitize HTML in the badges.
-    -   You no longer be able to use HTML expressions in badge contents.
--   **Don't upgrade to this version if you use [Build Monitor Plugin](https://plugins.jenkins.io/build-monitor-plugin/).**
-    -   Groovy-postbuild-2.4 breaks build-moitor-1.12 or earlier. Sorry.
-    -   Please postpone upgrading groovy-postbuild till fixing this issue:
-        [JENKINS-50420](https://issues.jenkins.io/browse/JENKINS-50420)
-    -   No new features in groovy-postbuild-2.4, and you can use
-        groovy-postbuild-2.3.1.
-        -   You can downgrade your groovy-postbuild in the Jenkins
-            Plugin Management page.
-        -   You can download earlier versions of groovy-postbuild from
-            "Archives" link in
-            <https://plugins.jenkins.io/groovy-postbuild>
--   Some classes are migrated to badge-plugin. Please change classes in
-    your codes if you access those classes:
-
-    | Old Class                                                             | New Class                                             |
-    |-----------------------------------------------------------------------|-------------------------------------------------------|
-    | org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildAction        | com.jenkinsci.plugins.badge.action.BadgeAction        |
-    | org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildSummaryAction | com.jenkinsci.plugins.badge.action.BadgeSummaryAction |
-
 ## Version 2.3.1 (Feb 7, 2016)
 
 -   Dependency to pipeline (aka. workflow) is optional

README.md

@@ -277,10 +277,10 @@ Please review and follow the instructions in ["How to report an issue"](https://
 -   [Open Issues](https://issues.jenkins.io/issues/?jql=resolution%20is%20EMPTY%20and%20component%3D15685)
 -   [Bug report or enhancement request](https://www.jenkins.io/participate/report-issue/redirect/#15685)
 
-## Changelog in [GitHub Releases](https://github.com/jenkinsci/git-client-plugin/releases)
+## Changelog in [GitHub Releases](https://github.com/jenkinsci/groovy-postbuild-plugin/releases)
 
-Release notes have been recorded in https://github.com/jenkinsci/git-client-plugin/releases[GitHub] since release 2.7.0.
-Prior release notes were recorded in the repository [change log]().
+Release notes have been recorded in [GitHub](https://github.com/jenkinsci/groovy-postbuild-plugin/releases) since release 2.4.
+Prior release notes are in the repository [change log](https://github.com/jenkinsci/groovy-postbuild-plugin/blob/master/CHANGELOG.md).
 
 ## Migration from 1.X