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-rw-r--r--compiler/rustc_span/src/def_id.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/compiler/rustc_span/src/def_id.rs b/compiler/rustc_span/src/def_id.rs
index 4b5bd75d5b1..b2d51ac6c0d 100644
--- a/compiler/rustc_span/src/def_id.rs
+++ b/compiler/rustc_span/src/def_id.rs
@@ -222,7 +222,6 @@ rustc_index::newtype_index! {
     }
 }
 
-// njn: I don't understand these
 impl<E: Encoder> Encodable<E> for DefIndex {
     default fn encode(&self, _: &mut E) {
         panic!("cannot encode `DefIndex` with `{}`", std::any::type_name::<E>());