Get rid of autoref-specialisation #1201

Job	Run time
Clippy	1m 8s
Test (MSRV)	1m 17s
Test (stable)	2m 0s
Test (beta)	2m 11s
Build docs	1m 34s
Rustfmt	14s
Test (nightly)	1m 46s
Test (macOS)	1m 32s
Test (Windows)	5m 18s
Test (no features)	1m 23s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 17s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 26s
	21m 6s

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