chore: remove feature(doc_auto_cfg) (#1019) #2741

Job	Run time
miri --no-default-features	5m 40s
miri --all-features	9m 26s
miri	7m 5s
wasm	37s
typos	5s
clippy	1m 32s
fmt	17s
docs	1m 16s
test windows-latest stable --no-default-features	2m 19s
test ubuntu-latest nightly --no-default-features	1m 13s
test ubuntu-latest nightly	1m 12s
test ubuntu-latest 1.85	32s
test ubuntu-latest 1.85 --no-default-features	32s
test ubuntu-latest stable	1m 6s
test windows-latest stable	2m 27s
test ubuntu-latest stable --no-default-features	59s
test windows-latest 1.85 --no-default-features	1m 32s
test windows-latest 1.85 --features json	1m 33s
test windows-latest nightly --all-features	3m 31s
test windows-latest 1.85	1m 11s
test windows-latest nightly	2m 51s
check no_std	50s
test windows-latest nightly --no-default-features	2m 52s
test ubuntu-latest nightly --all-features	1m 37s
features nightly	3m 14s
features stable	2m 4s
features nightly --all-targets	4m 12s
test ubuntu-latest 1.85 --features json	36s
features stable --all-targets	3m 26s
deny / cargo deny check	20s
ci success	2s
	1h 6m 9s

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