contributed to mathlib4: #43503 bundles 32 mechanically found typeclass weakenings

Contributed to leanprover-community/mathlib4: PR #43503 weakens unused typeclass assumptions on section variables across 29 files — 32 one-line changes, 32 insertions and 32 deletions. Each was found by the unused-assumptions pipeline (LLM + Lean 4 propose, the compiler decides): replace one binder with a weaker class, keep the proof unchanged, compile it alone. Every change built against its unmodified file, with the whole library compiling locally at 633b366493. It is one PR rather than many by deliberate choice, citing mathlib’s own #42214 (813 files of the same kind of change) as precedent; the background is on the mathlib Zulip, where a reader spotted a further simplification in one refactored file.