Rollup merge of #156876 - fallofpheonix:fix-unpretty-identified, r=bjorn3 Remove useless -Zunpretty=identified option The `-Zunpretty=identified` option (without `expanded`) is effectively useless because `NodeId`s are unassigned prior to macro expansion, leading them to just be `NodeId::MAX_AS_U32`. This commit removes the `Identified` variant from `PpSourceMode` and removes `-Zunpretty=identified` from the command-line options. Users should use `-Zunpretty=expanded,identified` instead (which is retained) if they want to inspect `NodeId`s. Fixes rust-lang/rust#10671
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