logstash: remove unecessary dependency to the openjdk package

java is now included in the logstash package

Related to T3750

The openjdk-11-jre-headless can be safely uninstalled.

Test Plan

diff origin/production/logstash0.internal.softwareheritage.org current/logstash0.internal.softwareheritage.org
*******************************************
- Anchor[java::begin:]
*******************************************
- Anchor[java::end]
*******************************************
- Exec[update-java-alternatives]
*******************************************
- File_line[java-home-environment]
*******************************************
- Package[java-common]
*******************************************
- Package[java]
*******************************************
*** End octocatalog-diff on logstash0.internal.softwareheritage.org

---

Migrated from D6689 (view on Phabricator)