[ci] Remove quick-benchmarks-omni from GitLab #10637

Job	Run time
check-workspace	20s
check-dependency-rules	7s
check-fail-ci	14s
check-markdown	11s
preflight / preflight	1m 15s
preflight / ci-versions	1m 20s
check-rust-feature-propagation	2m 34s
check-toml-format	1m 33s
fmt	1m 26s
test-rust-features	2m 37s
check-umbrella	2m 48s
All quick checks passed	1s
	14m 26s

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