Remove heading that isn't rendered correctly #19235

Job	Run time
check-code	9m 32s
Check for 'skip-ci' label	1s
check-msrv	5m 18s
lockbud	13m 52s
target-branch-check	1s
beacon-chain-tests	17m 23s
release-tests-ubuntu	21m 17s
op-pool-tests	16m 6s
release-tests-windows	33m 31s
basic-simulator-ubuntu	16m 21s
cargo-udeps	7m 30s
cli-check	8m 24s
compile-with-beta-compiler	15m 46s
debug-tests-ubuntu	8m 56s
ef-tests-ubuntu	11m 35s
execution-engine-integration-ubuntu	10m 27s
fallback-simulator-ubuntu	14m 26s
network-tests	18m 43s
slasher-tests	3m 31s
state-transition-vectors-ubuntu	2m 39s
test-suite-success	5s
	3h 55m 24s

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