Clean up axum-extra'a new error-response feature (#3057) #5081

Job	Run time
check	2m 38s
cargo-hack	4m 7s
check-docs	38s
cargo-public-api-crates (axum)	35s
cargo-public-api-crates (axum-core)	24s
dependencies-are-sorted	40s
Spell Check with Typos	4s
cargo-public-api-crates (axum-extra)	32s
cargo-deny check (advisories)	25s
cargo-public-api-crates (axum-macros)	23s
cargo-deny check (bans licenses sources)	22s
test-docs	1m 31s
armv5te-unknown-linux-musleabi	44s
test-msrv	2m 40s
test-nightly	1m 36s
test-versions (stable)	2m 21s
wasm32-unknown-unknown	33s
test-versions (beta)	4m 27s
	24m 40s

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