Get rid of autoref-specialisation #1211

Job	Run time
Build docs	1m 29s
Clippy	50s
Rustfmt	7s
Test (MSRV)	1m 19s
Test (stable)	1m 56s
Test (beta)	1m 59s
Test (nightly)	1m 45s
Test (macOS)	2m 43s
Test (Windows)	4m 11s
Test (no features)	1m 8s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 12s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 19s
	19m 58s

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