remove 2026

Author: nikomatsakis

src/SUMMARY.md

@@ -9,12 +9,6 @@
 - [Goals not accepted](./2025h2/not_accepted.md)
 - [Reports](./2025h2/reports.md)
 
-# ⏳ 2026 goal process
-
-- [Overview](./2026/README.md)
-- [Proposed goals](./2026/goals.md)
-- [Goals not accepted](./2026/not_accepted.md)
-
 # 📖 Learn about
 
 - [Goal motivations](./about/motivation.md)