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Rollup merge of #129774 - nnethercote:rm-extern-crate-tracing-remainder, r=GuillaumeGomez
Remove `#[macro_use] extern crate tracing` from rustdoc and rustfmt
A follow-up to #129767 and earlier PRs doing this for `rustc_*` crates.
r? ```@GuillaumeGomez```
