Drop the java-libraries promote job

Change-Id: Ica2d066de759aa023eb24d8e2d974bd45e49f649

playbooks/java-libraries/promote.yaml

@@ -1,16 +0,0 @@
-- hosts: all
-  vars:
-    library_path: "{{ zuul.project.src_dir }}/{{ java_libraries[0].context }}"
-  roles:
-    - install-jdk
-    - install-maven
-
-  tasks:
-    - name: Perform release
-      command: mvn release:perform
-      args:
-        chdir: "{{ library_path }}"
-      environment:
-        MAVEN_HOME: "/opt/apache-maven-3.8.8"
-        PATH: "{{ ansible_env.PATH }}:/opt/apache-maven-3.8.8/bin"
-      become: yes

zuul.d/jobs.yaml

@@ -33,12 +33,3 @@
     secrets:
       - name: nebulous_nexus_repository_credentials
         secret: nebulous-nexus-repository-credentials
-
-- job:
-    name: nebulous-promote-java-libraries
-    run: playbooks/java-libraries/promote.yaml
-    roles:
-      - zuul: nebulous/zuul-jobs
-    secrets:
-      - name: nebulous_nexus_repository_credentials
-        secret: nebulous-nexus-repository-credentials