Remove JDK 20 variant from CI build.

ci/images/ci-image/Dockerfile

@@ -6,6 +6,5 @@ RUN ./setup.sh
 
 ENV JAVA_HOME /opt/openjdk/java17
 ENV JDK17 /opt/openjdk/java17
-ENV JDK20 /opt/openjdk/java20
 
 ENV PATH $JAVA_HOME/bin:$PATH

ci/images/setup.sh

@@ -20,7 +20,7 @@ curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.4/c
 
 mkdir -p /opt/openjdk
 pushd /opt/openjdk > /dev/null
-for jdk in java17 java20
+for jdk in java17
 do
   JDK_URL=$( /get-jdk-url.sh $jdk )
   mkdir $jdk

ci/pipeline.yml

@@ -90,13 +90,6 @@ resources:
     <<: *docker-resource-source
     repository: ((docker-hub-organization))/spring-framework-ci
     tag: ((milestone))
-- name: every-morning
-  type: time
-  icon: alarm
-  source:
-    start: 8:00 AM
-    stop: 9:00 AM
-    location: Europe/Vienna
 - name: artifactory-repo
   type: artifactory-resource
   icon: package-variant
@@ -113,14 +106,6 @@ resources:
     access_token: ((github-ci-status-token))
     branch: ((branch))
     context: build
-- name: repo-status-jdk20-build
-  type: github-status-resource
-  icon: eye-check-outline
-  source:
-    repository: ((github-repo-name))
-    access_token: ((github-ci-status-token))
-    branch: ((branch))
-    context: jdk20-build
 - name: slack-alert
   type: slack-notification
   icon: slack
@@ -217,34 +202,6 @@ jobs:
           "zip.type": "schema"
     get_params:
       threads: 8
-- name: jdk20-build
-  serial: true
-  public: true
-  plan:
-    - get: ci-image
-    - get: git-repo
-    - get: every-morning
-      trigger: true
-    - put: repo-status-jdk20-build
-      params: { state: "pending", commit: "git-repo" }
-    - do:
-        - task: check-project
-          image: ci-image
-          file: git-repo/ci/tasks/check-project.yml
-          privileged: true
-          timeout: ((task-timeout))
-          params:
-            TEST_TOOLCHAIN: 20
-            <<: *build-project-task-params
-      on_failure:
-        do:
-          - put: repo-status-jdk20-build
-            params: { state: "failure", commit: "git-repo" }
-          - put: slack-alert
-            params:
-              <<: *slack-fail-params
-    - put: repo-status-jdk20-build
-      params: { state: "success", commit: "git-repo" }
 - name: stage-milestone
   serial: true
   plan:
@@ -396,7 +353,7 @@ jobs:
 
 groups:
 - name: "builds"
-  jobs: ["build", "jdk20-build"]
+  jobs: ["build"]
 - name: "releases"
   jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
 - name: "ci-images"

ci/scripts/check-project.sh

@@ -4,6 +4,6 @@ set -e
 source $(dirname $0)/common.sh
 
 pushd git-repo > /dev/null
-./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false -Porg.gradle.java.installations.fromEnv=JDK17,JDK20 \
+./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false -Porg.gradle.java.installations.fromEnv=JDK17 \
   -PmainToolchain=${MAIN_TOOLCHAIN} -PtestToolchain=${TEST_TOOLCHAIN} --no-daemon --max-workers=4 check antora
 popd > /dev/null