Get rid of autoref-specialisation #1217

Job	Run time
Clippy	56s
Rustfmt	9s
Build docs	1m 26s
Test (MSRV)	1m 20s
Test (stable)	1m 51s
Test (beta)	2m 2s
Test (nightly)	1m 49s
Test (macOS)	1m 33s
Test (Windows)	4m 40s
Test (no features)	1m 11s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 23s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 24s
	19m 44s

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