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-rw-r--r--compiler/rustc_ast_lowering/src/errors.rs7
1 files changed, 0 insertions, 7 deletions
diff --git a/compiler/rustc_ast_lowering/src/errors.rs b/compiler/rustc_ast_lowering/src/errors.rs
index def74c2adee..5e6b6050bc0 100644
--- a/compiler/rustc_ast_lowering/src/errors.rs
+++ b/compiler/rustc_ast_lowering/src/errors.rs
@@ -88,13 +88,6 @@ pub struct MisplacedAssocTyBinding<'a> {
 }
 
 #[derive(Diagnostic, Clone, Copy)]
-#[diag(ast_lowering_rustc_box_attribute_error)]
-pub struct RustcBoxAttributeError {
-    #[primary_span]
-    pub span: Span,
-}
-
-#[derive(Diagnostic, Clone, Copy)]
 #[diag(ast_lowering_underscore_expr_lhs_assign)]
 pub struct UnderscoreExprLhsAssign {
     #[primary_span]