feat: remove bogs titles

[nikku]

Proposed Changes

Title is meant to convey additional information, not state the obvious. Hence this PR removes titles that are just copying existing contents:

Try out via

npx @bpmn-io/sr bpmn-io/bpmn-js-properties-panel -l bpmn-io/properties-panel#untitle

Checklist

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• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}