Transmission cleanup #74181

Job	Run time
check-doc	10m 37s
check-bevy-internal-imports	5s
typos	10s
toml	7s
miri	24m 44s
check-release-content	26s
check-missing-examples-in-docs	34s
build (macos-latest)	20m 45s
build (ubuntu-latest)	12m 27s
ci	5m 15s
build (windows-latest)	24m 46s
check-missing-features-in-docs	27s
markdownlint	1m 31s
check-compiles-no-std-examples	54s
check-compiles	9m 40s
check-compiles-no-std-portable-atomic	1m 2s
check-compiles-no-std	1m 10s
msrv	2m 25s
build-wasm	1m 50s
build-wasm-atomics	1m 55s
	2h 0m 50s

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