Simplify CI

Author: basil

Jenkinsfile

@@ -2,15 +2,4 @@
  * See the documentation for more options:
  * https://github.com/jenkins-infra/pipeline-library/
  */
-buildPlugin(useContainerAgent: true, configurations: [
-  // Test the long-term support end of the compatibility spectrum (i.e., the minimum required
-  // Jenkins version).
-  [ platform: 'linux', jdk: '8' ],
-
-  // Test the common case (i.e., a recent LTS release) on both Linux and Windows.
-  [ platform: 'linux', jdk: '11', jenkins: '2.332.1' ],
-  [ platform: 'windows', jdk: '11', jenkins: '2.332.1' ],
-
-  // Test the bleeding edge of the compatibility spectrum (i.e., the latest supported Java runtime).
-  [ platform: 'linux', jdk: '17', jenkins: '2.342' ],
-])
+buildPlugin(useContainerAgent: true)