Iox #252 remove redundant methods from pubsub api

[orecham]

Pre-Review Checklist for the PR Author

1. Branch follows the naming format (iox-#123-this-is-a-branch)
2. Commits messages are according to this guideline
   • Commit messages have the issue ID (iox-#123 commit text)
   • Commit messages are signed (git commit -s)
   • Commit author matches Eclipse Contributor Agreement (and ECA is signed)
3. Update the PR title
   • Follow the same conventions as for commit messages
   • Link to the relevant issue
4. Relevant issues are linked
5. Add sensible notes for the reviewer
6. All checks have passed
7. Assign PR to reviewer

Notes for Reviewer

Checklist for the PR Reviewer

• Commits are properly organized and messages are according to the guideline
• Code according to our coding style and naming conventions
• Unit tests have been written for new behavior
• Public API changes are documented via doxygen
• Copyright owner are updated in the changed files
• PR title describes the changes

Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

Post-review Checklist for the Eclipse Committer

1. All checkboxes in the PR checklist are checked or crossed out
2. Merge

References

• Closes TBD

[elfenpiff]

Woh whoopsi we all overlooked that one. Good catch!