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Fix CI after Rust 1.80, remove dead feature references #3899

Job	Run time
Check (async-std, native-tls)	1m 22s
Check (async-std, rustls)	1m 24s
Format	12s
Check (async-std, none)	1m 20s
Check (tokio, native-tls)	1m 17s
Check (tokio, rustls)	1m 16s
Check (tokio, none)	1m 14s
Check build using minimal versions	1m 18s
Unit Test (async-std, native-tls)	47s
Unit Test (async-std, rustls)	35s
Unit Test (async-std, none)	36s
Unit Test (tokio, native-tls)	28s
Unit Test (tokio, rustls)	33s
Unit Test (tokio, none)	32s
MariaDB	0s
MySQL	0s
Postgres	0s
SQLite	0s
	12m 54s

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