docs(lib): do not inline http rexports #2881

Job	Run time
Check Style	17s
Verify hyper.h is up to date	33s
semver	20s
features	35s
Test with Miri	2m 38s
minimal-versions	30s
Test C API (FFI)	18s
Check MSRV	1m 22s
Test stable on ubuntu-latest	1m 19s
udeps	21s
Test stable on windows-latest	2m 13s
Test stable on macOS-latest	1m 22s
Test beta on ubuntu-latest	1m 11s
Test beta on windows-latest	1m 56s
Test beta on macOS-latest	1m 7s
Test nightly on ubuntu-latest	1m 21s
Test nightly on windows-latest	2m 20s
Test nightly on macOS-latest	1m 37s
Build docs	20s
Check exposed types	21s
CI is green	1s
	22m 2s

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