Drop Java 15 build

Closes gh-25782

ci/images/ci-image-jdk15/Dockerfile

@@ -1,12 +0,0 @@
-FROM ubuntu:focal-20210217
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-ADD get-docker-url.sh /get-docker-url.sh
-RUN ./setup.sh java15
-
-ENV JAVA_HOME /opt/openjdk
-ENV PATH $JAVA_HOME/bin:$PATH
-ADD docker-lib.sh /docker-lib.sh
-
-ENTRYPOINT [ "switch", "shell=/bin/bash", "--", "codep", "/bin/docker daemon" ]

ci/images/get-jdk-url.sh

@@ -8,9 +8,6 @@ case "$1" in
 	java11)
 		 echo "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.10%2B9/OpenJDK11U-jdk_x64_linux_hotspot_11.0.10_9.tar.gz"
 	;;
-	java15)
-		 echo "https://github.com/AdoptOpenJDK/openjdk15-binaries/releases/download/jdk-15.0.2%2B7/OpenJDK15U-jdk_x64_linux_hotspot_15.0.2_7.tar.gz"
-	;;
 	java16)
 		 echo "https://github.com/AdoptOpenJDK/openjdk16-binaries/releases/download/jdk-16%2B36/OpenJDK16-jdk_x64_linux_hotspot_16_36.tar.gz"
 	;;

ci/pipeline.yml

@@ -156,12 +156,6 @@ resources:
   source:
     <<: *registry-image-resource-source
     repository: ((docker-hub-organization))/spring-boot-ci-jdk11
-- name: ci-image-jdk15
-  type: registry-image
-  icon: docker
-  source:
-    <<: *registry-image-resource-source
-    repository: ((docker-hub-organization))/spring-boot-ci-jdk15
 - name: ci-image-jdk16
   type: registry-image
   icon: docker
@@ -192,14 +186,6 @@ resources:
     access_token: ((github-ci-status-token))
     branch: ((branch))
     context: jdk11-build
-- name: repo-status-jdk15-build
-  type: github-status-resource
-  icon: eye-check-outline
-  source:
-    repository: ((github-repo-name))
-    access_token: ((github-ci-status-token))
-    branch: ((branch))
-    context: jdk15-build
 - name: repo-status-jdk16-build
   type: github-status-resource
   icon: eye-check-outline
@@ -250,13 +236,6 @@ jobs:
         image: ci-image-jdk11
       vars:
         ci-image-name: ci-image-jdk11
-    - task: build-ci-image-jdk15
-      privileged: true
-      file: git-repo/ci/tasks/build-ci-image.yml
-      output_mapping:
-        image: ci-image-jdk15
-      vars:
-        ci-image-name: ci-image-jdk15
     - task: build-ci-image-jdk16
       privileged: true
       file: git-repo/ci/tasks/build-ci-image.yml
@@ -271,9 +250,6 @@ jobs:
     - put: ci-image-jdk11
       params:
         image: ci-image-jdk11/image.tar
-    - put: ci-image-jdk15
-      params:
-        image: ci-image-jdk15/image.tar
     - put: ci-image-jdk16
       params:
         image: ci-image-jdk16/image.tar
@@ -296,12 +272,6 @@ jobs:
       params:
         <<: *github-task-params
         JDK_VERSION: java11
-    - task: detect-jdk15-update
-      image: ci-image
-      file: git-repo/ci/tasks/detect-jdk-updates.yml
-      params:
-        <<: *github-task-params
-        JDK_VERSION: java15
     - task: detect-jdk16-update
       image: ci-image
       file: git-repo/ci/tasks/detect-jdk-updates.yml
@@ -420,31 +390,6 @@ jobs:
   - put: slack-alert
     params:
       <<: *slack-success-params
-- name: jdk15-build
-  serial: true
-  public: true
-  plan:
-    - get: ci-image-jdk15
-    - get: git-repo
-      trigger: true
-    - put: repo-status-jdk15-build
-      params: { state: "pending", commit: "git-repo" }
-    - do:
-      - task: build-project
-        image: ci-image-jdk15
-        <<: *build-project-task-params
-      on_failure:
-        do:
-          - put: repo-status-jdk15-build
-            params: { state: "failure", commit: "git-repo" }
-          - put: slack-alert
-            params:
-              <<: *slack-fail-params
-    - put: repo-status-jdk15-build
-      params: { state: "success", commit: "git-repo" }
-    - put: slack-alert
-      params:
-       <<: *slack-success-params
 - name: jdk16-build
   serial: true
   public: true
@@ -700,7 +645,7 @@ jobs:
         repository: updated-homebrew-tap-repo
 groups:
 - name: "builds"
-  jobs: ["build", "jdk11-build", "jdk15-build", "jdk16-build", "windows-build"]
+  jobs: ["build", "jdk11-build", "jdk16-build", "windows-build"]
 - name: "releases"
   jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release", "publish-to-sdkman", "update-homebrew-tap"]
 - name: "ci-images"

ci/scripts/detect-jdk-updates.sh

@@ -16,10 +16,6 @@ case "$JDK_VERSION" in
 		 BASE_URL="https://api.adoptopenjdk.net/v3/assets/feature_releases/11/ga"
 		 ISSUE_TITLE="Upgrade Java 11 version in CI image"
 	;;
-	java15)
-		 BASE_URL="https://api.adoptopenjdk.net/v3/assets/feature_releases/15/ga"
-		 ISSUE_TITLE="Upgrade Java 15 version in CI image"
-	;;
 	java16)
 		 BASE_URL="https://api.adoptopenjdk.net/v3/assets/feature_releases/16/ga"
 		 ISSUE_TITLE="Upgrade Java 16 version in CI image"