Fixed lint error and beacon rewards regression test after unstable merge #17

Job	Run time
check-code	3m 7s
Check for 'skip-ci' label	1s
target-branch-check	1s
check-msrv	5m 6s
network-tests	8m 32s
beacon-chain-tests	34m 21s
debug-tests-ubuntu	7m 54s
op-pool-tests	12m 18s
release-tests-ubuntu	28m 32s
release-tests-windows	49m 13s
basic-simulator-ubuntu	13m 33s
slasher-tests	1m 50s
cargo-udeps	7m 29s
compile-with-beta-compiler	13m 51s
ef-tests-ubuntu	7m 41s
execution-engine-integration-ubuntu	49m 39s
fallback-simulator-ubuntu	11m 12s
state-transition-vectors-ubuntu	2m 27s
cli-check	8m 33s
test-suite-success	0s
	4h 25m 20s

Provide feedback