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Fix CI after Rust 1.80, remove dead feature references #3898

Job	Run time
Check build using minimal versions	1m 23s
Check (async-std, native-tls)	1m 25s
Check (async-std, rustls)	1m 33s
Format	10s
Check (async-std, none)	1m 17s
Check (tokio, native-tls)	1m 20s
Check (tokio, rustls)	1m 25s
Unit Test (async-std, native-tls)	41s
Check (tokio, none)	1m 15s
Unit Test (async-std, rustls)	40s
Unit Test (async-std, none)	42s
Unit Test (tokio, native-tls)	43s
Unit Test (tokio, rustls)	37s
Unit Test (tokio, none)	38s
SQLite	0s
MySQL	0s
MariaDB	0s
Postgres	0s
	13m 49s

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