Revert "Port `#[allow_internal_unsafe]` to the new attribute system"

This reverts commit 4f7a6ace9e2f2192af7b5d32f4b1664189e0e143.

2 files changed, 1 insertions, 12 deletions

diff --git a/compiler/rustc_attr_parsing/src/attributes/macro_attrs.rs b/compiler/rustc_attr_parsing/src/attributes/macro_attrs.rs
index 0779248e1a9..886f7a889d3 100644
--- a/compiler/rustc_attr_parsing/src/attributes/macro_attrs.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/macro_attrs.rs
@@ -113,11 +113,3 @@ impl<S: Stage> AttributeParser<S> for MacroUseParser {
         Some(AttributeKind::MacroUse { span: self.first_span?, arguments: self.state })
     }
 }
-
-pub(crate) struct AllowInternalUnsafeParser;
-
-impl<S: Stage> NoArgsAttributeParser<S> for AllowInternalUnsafeParser {
-    const PATH: &[Symbol] = &[sym::allow_internal_unsafe];
-    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Ignore;
-    const CREATE: fn(Span) -> AttributeKind = |span| AttributeKind::AllowInternalUnsafe(span);
-}
diff --git a/compiler/rustc_attr_parsing/src/context.rs b/compiler/rustc_attr_parsing/src/context.rs
index 1420753a44e..80dfdffdb55 100644
--- a/compiler/rustc_attr_parsing/src/context.rs
+++ b/compiler/rustc_attr_parsing/src/context.rs
@@ -33,9 +33,7 @@ use crate::attributes::lint_helpers::{
     AsPtrParser, AutomaticallyDerivedParser, PassByValueParser, PubTransparentParser,
 };
 use crate::attributes::loop_match::{ConstContinueParser, LoopMatchParser};
-use crate::attributes::macro_attrs::{
-    AllowInternalUnsafeParser, MacroEscapeParser, MacroUseParser,
-};
+use crate::attributes::macro_attrs::{MacroEscapeParser, MacroUseParser};
 use crate::attributes::must_use::MustUseParser;
 use crate::attributes::no_implicit_prelude::NoImplicitPreludeParser;
 use crate::attributes::non_exhaustive::NonExhaustiveParser;
@@ -180,7 +178,6 @@ attribute_parsers!(
         Single<SkipDuringMethodDispatchParser>,
         Single<TransparencyParser>,
         Single<WithoutArgs<AllowIncoherentImplParser>>,
-        Single<WithoutArgs<AllowInternalUnsafeParser>>,
         Single<WithoutArgs<AsPtrParser>>,
         Single<WithoutArgs<AutomaticallyDerivedParser>>,
         Single<WithoutArgs<CoherenceIsCoreParser>>,