Chore: remove outdated comment #4287

Job	Run time
lint	1m 51s
cluster-benchmark (cluster_benchmark)	45s
openraft-feature-test (nightly)	50s
openraft-feature-test (nightly, serde)	50s
examples (stable, memstore)	38s
openraft-test (stable, 0)	3m 31s
openraft-test-bench (nightly)	1m 1s
openraft-feature-test (nightly, single-term-leader)	48s
examples (stable, rocksstore)	6m 25s
openraft-test (nightly, 30)	3m 23s
examples (stable, raft-kv-memstore)	2m 40s
openraft-feature-test (nightly, single-term-leader,serde,singlethreaded)	49s
openraft-test (nightly, 0, single-term-leader)	3m 19s
rt-monoio	45s
examples (stable, raft-kv-memstore-grpc)	1m 46s
examples (stable, raft-kv-memstore-network-v2)	1m 2s
stores (stores/memstore)	53s
Build (nightly, bench,serde,bt,singlethreaded)	48s
examples (stable, raft-kv-memstore-opendal-snapshot-data)	1m 4s
tests-feature-test (nightly)	2m 53s
examples (stable, raft-kv-memstore-singlethreaded)	50s
tests-feature-test (nightly, single-term-leader)	2m 54s
examples (stable, raft-kv-rocksdb)	8m 29s
examples (nightly, memstore)	59s
examples (nightly, rocksstore)	11m 36s
examples (nightly, raft-kv-memstore)	2m 24s
examples (nightly, raft-kv-memstore-grpc)	1m 41s
examples (nightly, raft-kv-memstore-network-v2)	1m 6s
examples (nightly, raft-kv-memstore-opendal-snapshot-data)	1m 31s
examples (nightly, raft-kv-memstore-singlethreaded)	1m 10s
examples (nightly, raft-kv-rocksdb)	12m 19s
	1h 21m 0s

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