chore: remove dead Margins landing chapter and MarginGap graphic

Merged
DE
2d ago
+0-228

Remove the unused Margins landing chapter component and its sole consumer
graphic MarginGap. Both were rendered on the landing page until the Oct
2026 rework (PR #15581) replaced the old chaptered narrative with the new
story chapters (Understand, Agents, Charge). Margins has had no
importers since then, and MarginGap was only ever imported by Margins.

History

  • Last materially changed August 2026 (#13773 @emilwidlund)

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