Merge pull request #496 from jmtd/OPENJDK-3029-no-singleton-jdk

[Openjdk 3029] no singleton jdk required for openjdk-21

Author: jmtd

ubi8-openjdk-21.yaml

@@ -54,7 +54,6 @@ modules:
     version: "3.8.17"
   - name: jboss.container.util.tzdata
   - name: jboss.container.java.s2i.bash
-  - name: jboss.container.java.singleton-jdk
 
 help:
   add: true