Auto merge of #118297 - shepmaster:warn-dead-tuple-fields, r=WaffleLapkin

Merge `unused_tuple_struct_fields` into `dead_code`

This implicitly upgrades the lint from `allow` to `warn` and places it into the `unused` lint group.

[Discussion on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Moving.20.60unused_tuple_struct_fields.60.20from.20allow.20to.20warn)

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/ui/structs-enums/enum-null-pointer-opt.rs b/tests/ui/structs-enums/enum-null-pointer-opt.rs
index 85fa1eac2e2..356f8a6dd36 100644
--- a/tests/ui/structs-enums/enum-null-pointer-opt.rs
+++ b/tests/ui/structs-enums/enum-null-pointer-opt.rs
@@ -10,8 +10,8 @@ use std::sync::Arc;
 trait Trait { fn dummy(&self) { } }
 trait Mirror { type Image; }
 impl<T> Mirror for T { type Image = T; }
-struct ParamTypeStruct<T>(#[allow(unused_tuple_struct_fields)] T);
-struct AssocTypeStruct<T>(#[allow(unused_tuple_struct_fields)] <T as Mirror>::Image);
+struct ParamTypeStruct<T>(#[allow(dead_code)] T);
+struct AssocTypeStruct<T>(#[allow(dead_code)] <T as Mirror>::Image);
 #[repr(transparent)]
 union MaybeUninitUnion<T: Copy> {
     _value: T,
@@ -46,7 +46,7 @@ fn main() {
     struct Foo {
         _a: Box<isize>
     }
-    struct Bar(#[allow(unused_tuple_struct_fields)] Box<isize>);
+    struct Bar(#[allow(dead_code)] Box<isize>);
 
     // Should apply through structs
     assert_eq!(size_of::<Foo>(), size_of::<Option<Foo>>());