Simplify Jenkinsfile (#780)

Author: NotMyFault

Jenkinsfile

@@ -1,26 +1,21 @@
 #!/usr/bin/env groovy
 
-/* Only keep the 10 most recent builds. */
-properties([[$class: 'BuildDiscarderProperty',
-                strategy: [$class: 'LogRotator', numToKeepStr: '10']]])
-
-
 node('java') {
-    timestamps {
-        stage('Checkout') {
-            checkout scm
-        }
+        timestamps {
+                stage('Checkout') {
+                        checkout scm
+                }
 
-        stage('Build') {
-            withEnv([
-                "JAVA_HOME=${tool 'jdk17'}",
-                "PATH+MVN=${tool 'mvn'}/bin",
-                'PATH+JDK=$JAVA_HOME/bin',
-            ]) {
-                timeout(30) {
-                    sh 'mvn clean install versions:display-plugin-updates'
+                stage('Build') {
+                        withEnv([
+                                "JAVA_HOME=${tool 'jdk25'}",
+                                "PATH+MVN=${tool 'mvn'}/bin",
+                                'PATH+JDK=$JAVA_HOME/bin',
+                        ]) {
+                                timeout(30) {
+                                        sh 'mvn clean install versions:display-plugin-updates'
+                                }
+                        }
                 }
-            }
         }
-    }
 }