Remove Yield effect from aio example #38
Failure
✅ (analysis) (passed)
✅ (lint-doc) (passed)
❌ (lint-fmt) (failed: dune build @fmt failed)
✅ (lint-opam) (passed)
✅ (lower-bound) (passed)
✅ alpine-3.18-5.1_opam-2.1 (passed)
✅ debian-10-5.1_opam-2.1 (passed)
✅ debian-11-5.1_opam-2.1 (passed)
✅ debian-12-5.0_opam-2.1 (passed)
✅ debian-12-5.1+flambda_opam-2.1 (passed)
✅ debian-12-5.1_arm32_opam-2.1 (passed)
✅ debian-12-5.1_arm64_opam-2.1 (passed)
✅ debian-12-5.1_opam-2.1 (passed)
✅ debian-12-5.1_ppc64_opam-2.1 (passed)
✅ debian-12-5.1_s390x_opam-2.1 (passed)
✅ debian-12-5.1_x86_32_opam-2.1 (passed)
✅ fedora-37-5.1_opam-2.1 (passed)
✅ fedora-38-5.1_opam-2.1 (passed)
✅ opensuse-15.5-5.1_opam-2.1 (passed)
✅ ubuntu-20.04-5.1_opam-2.1 (passed)
✅ ubuntu-22.04-5.1_opam-2.1 (passed)
✅ ubuntu-23.04-5.1_opam-2.1 (passed)