Rollup merge of #126177 - carbotaniuman:unsafe_attr_errors, r=jieyouxu

Add hard error and migration lint for unsafe attrs

More implementation work for https://github.com/rust-lang/rust/issues/123757

This adds the migration lint for unsafe attributes, as well as making it a hard error in Rust 2024.

1 files changed, 1 insertions, 10 deletions

diff --git a/compiler/rustc_passes/src/errors.rs b/compiler/rustc_passes/src/errors.rs
index d27b94ebd22..f0596568092 100644
--- a/compiler/rustc_passes/src/errors.rs
+++ b/compiler/rustc_passes/src/errors.rs
@@ -4,7 +4,7 @@ use std::{
 };
 
 use crate::fluent_generated as fluent;
-use rustc_ast::{ast, Label};
+use rustc_ast::Label;
 use rustc_errors::{
     codes::*, Applicability, Diag, DiagCtxtHandle, DiagSymbolList, Diagnostic, EmissionGuarantee,
     Level, MultiSpan, SubdiagMessageOp, Subdiagnostic,
@@ -863,15 +863,6 @@ pub struct InvalidAttrAtCrateLevel {
     pub item: Option<ItemFollowingInnerAttr>,
 }
 
-#[derive(Diagnostic)]
-#[diag(passes_invalid_attr_unsafe)]
-#[note]
-pub struct InvalidAttrUnsafe {
-    #[primary_span]
-    pub span: Span,
-    pub name: ast::Path,
-}
-
 #[derive(Clone, Copy)]
 pub struct ItemFollowingInnerAttr {
     pub span: Span,