Remove some Maintainers from Pilz Planner

[jschleicher]

Description

Drop some pilz maintainers in ROS2 version. I am not involved in the ROS2 port moveit2 at all and thus I'd like to remove myself here.

Checklist

• Required by CI: Code is auto formatted using clang-format
• Extend the tutorials / documentation reference
• Document API changes relevant to the user in the MIGRATION.md notes
• Create tests, which fail without this PR reference
• Include a screenshot if changing a GUI
• While waiting for someone to review your request, please help review another open pull request to support the maintainers

[codecov]

Codecov Report

Merging #971 (3bcbb02) into main (4f97486) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #971   +/-   ##
=======================================
  Coverage   57.90%   57.90%           
=======================================
  Files         310      310           
  Lines       26113    26113           
=======================================
  Hits        15118    15118           
  Misses      10995    10995           

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