Remove non-existing tests from failing ui tests list #2879

Job	Run time
duplicates	3s
spell_check	8s
build (gcc-15.deb, --projects)	11m 23s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	12m 22s
build_system	38s
build (gcc-15.deb, --std-tests)	6m 51s
build (gcc-15.deb, --extended-regex-tests)	12m 9s
build (gcc-15-without-int128.deb, --std-tests)	6m 38s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	14m 12s
build (gcc-15.deb, --test-libcore)	17m 18s
build (gcc-15-without-int128.deb, --test-libcore)	16m 32s
build (gcc-15-without-int128.deb, --projects)	12m 24s
build (gcc-15.deb, --extended-regex-example-tests)	6m 33s
build (gcc-15-without-int128.deb, --extended-rand-tests)	8m 22s
build (gcc-15-without-int128.deb, --extended-regex-example-tests)	7m 24s
build (gcc-15-without-int128.deb, --extended-regex-tests)	11m 23s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	13m 11s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	12m 6s
build (gcc-15.deb, --extended-rand-tests)	8m 26s
success	3s
	2h 58m 6s

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