Get rid of autoref-specialisation #1157

Job	Run time
Build docs	1m 24s
Clippy	51s
Test (MSRV)	1m 28s
Rustfmt	14s
Test (stable)	1m 57s
Test (beta)	2m 9s
Test (nightly)	1m 43s
Test (macOS)	1m 28s
Test (Windows)	4m 34s
Test (no features)	1m 13s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 18s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 18s
	19m 37s

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