Cleanup single fallible case. #11808

Job	Run time
build_js	2m 9s
build_details	3s
build_opam (4.14.x)	9m 11s
build_opam (5.2.x)	5m 57s
tree_sitter_parse	49s
build_no_depopts	6m 9s
build_win32 (x64)	17m 57s
build_posix (debian_trixie, amd64)	16m 3s
lezer_parse	53s
build_posix (debian_bookworm, amd64)	15m 6s
run_tests (@citest)	13m 32s
build_posix (ubuntu_oracular, amd64)	15m 4s
update_doc	0s
run_tests (@doctest)	8m 21s
build_posix (ubuntu_noble, amd64)	15m 42s
run_tests (@mediatest)	9m 56s
build_posix (alpine, amd64)	12m 5s
fetch_s3_artifacts	20s
build_docker (amd64)	2m 11s
build_docker_alpine	0s
build_docker_minimal	0s
build_docker_alpine_minimal	0s
build_docker_release-minimal	0s
update_release	0s
build_docker_release	0s
	2h 31m 28s

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