Remove fixed workaround in `impl_runtime_apis` #9483

Job	Run time
check-dependency-rules	10s
check-fail-ci	13s
check-markdown	14s
check-workspace	19s
preflight / preflight	41s
preflight / ci-versions	54s
fmt	1m 8s
check-rust-feature-propagation	2m 1s
check-toml-format	52s
check-umbrella	2m 9s
test-rust-features	1m 49s
All quick checks passed	1s
	10m 31s

Provide feedback