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-rw-r--r--src/doc/rustc-dev-guide/src/serialization.md2
1 files changed, 0 insertions, 2 deletions
diff --git a/src/doc/rustc-dev-guide/src/serialization.md b/src/doc/rustc-dev-guide/src/serialization.md
index c796281060c..74c56007188 100644
--- a/src/doc/rustc-dev-guide/src/serialization.md
+++ b/src/doc/rustc-dev-guide/src/serialization.md
@@ -8,8 +8,6 @@ Specifically:
   crate, these are then deserialized by crates that depend on that library.
 - Certain query outputs are serialized in a binary format to
   [persist incremental compilation results].
-- The `-Z ast-json` and `-Z ast-json-noexpand` flags serialize the [AST] to json
-  and output the result to stdout.
 - [`CrateInfo`] is serialized to json when the `-Z no-link` flag is used, and
   deserialized from json when the `-Z link-only` flag is used.