diff --git a/compiler/rustc_builtin_macros/src/deriving/bounds.rs b/compiler/rustc_builtin_macros/src/deriving/bounds.rs
index 5ef68c6aeaa59..77e0b6c55a80e 100644
--- a/compiler/rustc_builtin_macros/src/deriving/bounds.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/bounds.rs
@@ -15,7 +15,6 @@ pub fn expand_deriving_copy(
 ) {
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: path_std!(marker::Copy),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/clone.rs b/compiler/rustc_builtin_macros/src/deriving/clone.rs
index 7755ff779c4d9..ee4c5aea1a352 100644
--- a/compiler/rustc_builtin_macros/src/deriving/clone.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/clone.rs
@@ -71,7 +71,6 @@ pub fn expand_deriving_clone(
     let attrs = vec![cx.attribute(inline)];
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: path_std!(clone::Clone),
         additional_bounds: bounds,
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs b/compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs
index 4e798bf6acb10..f99ee8cb2d53c 100644
--- a/compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs
@@ -23,7 +23,6 @@ pub fn expand_deriving_eq(
     let attrs = vec![cx.attribute(inline), cx.attribute(doc), cx.attribute(no_coverage)];
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: path_std!(cmp::Eq),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/cmp/ord.rs b/compiler/rustc_builtin_macros/src/deriving/cmp/ord.rs
index 1612be862377b..8aa16dfeb0f1f 100644
--- a/compiler/rustc_builtin_macros/src/deriving/cmp/ord.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/cmp/ord.rs
@@ -18,7 +18,6 @@ pub fn expand_deriving_ord(
     let attrs = vec![cx.attribute(inline)];
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: path_std!(cmp::Ord),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/cmp/partial_eq.rs b/compiler/rustc_builtin_macros/src/deriving/cmp/partial_eq.rs
index 0141b33772621..73be9362e4eb4 100644
--- a/compiler/rustc_builtin_macros/src/deriving/cmp/partial_eq.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/cmp/partial_eq.rs
@@ -98,7 +98,6 @@ pub fn expand_deriving_partial_eq(
 
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: path_std!(cmp::PartialEq),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/cmp/partial_ord.rs b/compiler/rustc_builtin_macros/src/deriving/cmp/partial_ord.rs
index 2ebb01cc8a035..137c779f81b84 100644
--- a/compiler/rustc_builtin_macros/src/deriving/cmp/partial_ord.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/cmp/partial_ord.rs
@@ -36,7 +36,6 @@ pub fn expand_deriving_partial_ord(
 
     let trait_def = TraitDef {
         span,
-        attributes: vec![],
         path: path_std!(cmp::PartialOrd),
         additional_bounds: vec![],
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/debug.rs b/compiler/rustc_builtin_macros/src/deriving/debug.rs
index ceef893e862eb..af370a7751da5 100644
--- a/compiler/rustc_builtin_macros/src/deriving/debug.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/debug.rs
@@ -19,7 +19,6 @@ pub fn expand_deriving_debug(
 
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: path_std!(fmt::Debug),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/decodable.rs b/compiler/rustc_builtin_macros/src/deriving/decodable.rs
index d688143a2a5c6..47da0862b52fc 100644
--- a/compiler/rustc_builtin_macros/src/deriving/decodable.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/decodable.rs
@@ -22,7 +22,6 @@ pub fn expand_deriving_rustc_decodable(
 
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: Path::new_(vec![krate, sym::Decodable], vec![], PathKind::Global),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/default.rs b/compiler/rustc_builtin_macros/src/deriving/default.rs
index 5177690917f21..a431832080c0c 100644
--- a/compiler/rustc_builtin_macros/src/deriving/default.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/default.rs
@@ -25,7 +25,6 @@ pub fn expand_deriving_default(
     let attrs = vec![cx.attribute(inline)];
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: Path::new(vec![kw::Default, sym::Default]),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/encodable.rs b/compiler/rustc_builtin_macros/src/deriving/encodable.rs
index 70167cac68a7e..d43c66a5fa644 100644
--- a/compiler/rustc_builtin_macros/src/deriving/encodable.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/encodable.rs
@@ -106,7 +106,6 @@ pub fn expand_deriving_rustc_encodable(
 
     let trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path: Path::new_(vec![krate, sym::Encodable], vec![], PathKind::Global),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
index 9f3a80ea7cbdc..9882f7958aaa5 100644
--- a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
@@ -184,8 +184,6 @@ pub struct TraitDef<'a> {
     /// The span for the current #[derive(Foo)] header.
     pub span: Span,
 
-    pub attributes: Vec<ast::Attribute>,
-
     /// Path of the trait, including any type parameters
     pub path: Path,
 
@@ -605,7 +603,7 @@ impl<'a> TraitDef<'a> {
                         param.bounds.iter().cloned()
                     ).collect();
 
-                cx.typaram(param.ident.span.with_ctxt(ctxt), param.ident, vec![], bounds, None)
+                cx.typaram(param.ident.span.with_ctxt(ctxt), param.ident, bounds, None)
             }
             GenericParamKind::Const { ty, kw_span, .. } => {
                 let const_nodefault_kind = GenericParamKind::Const {
@@ -718,15 +716,13 @@ impl<'a> TraitDef<'a> {
         let self_type = cx.ty_path(path);
 
         let attr = cx.attribute(cx.meta_word(self.span, sym::automatically_derived));
+        let attrs = vec![attr];
         let opt_trait_ref = Some(trait_ref);
 
-        let mut a = vec![attr];
-        a.extend(self.attributes.iter().cloned());
-
         cx.item(
             self.span,
             Ident::empty(),
-            a,
+            attrs,
             ast::ItemKind::Impl(Box::new(ast::Impl {
                 unsafety: ast::Unsafe::No,
                 polarity: ast::ImplPolarity::Positive,
diff --git a/compiler/rustc_builtin_macros/src/deriving/generic/ty.rs b/compiler/rustc_builtin_macros/src/deriving/generic/ty.rs
index 4d46f7cd48a51..36e2e29308694 100644
--- a/compiler/rustc_builtin_macros/src/deriving/generic/ty.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/generic/ty.rs
@@ -146,7 +146,6 @@ fn mk_ty_param(
     cx: &ExtCtxt<'_>,
     span: Span,
     name: Symbol,
-    attrs: &[ast::Attribute],
     bounds: &[Path],
     self_ident: Ident,
     self_generics: &Generics,
@@ -158,7 +157,7 @@ fn mk_ty_param(
             cx.trait_bound(path)
         })
         .collect();
-    cx.typaram(span, Ident::new(name, span), attrs.to_owned(), bounds, None)
+    cx.typaram(span, Ident::new(name, span), bounds, None)
 }
 
 /// Bounds on type parameters.
@@ -183,7 +182,7 @@ impl Bounds {
             .iter()
             .map(|t| {
                 let (name, ref bounds) = *t;
-                mk_ty_param(cx, span, name, &[], &bounds, self_ty, self_generics)
+                mk_ty_param(cx, span, name, &bounds, self_ty, self_generics)
             })
             .collect();
 
diff --git a/compiler/rustc_builtin_macros/src/deriving/hash.rs b/compiler/rustc_builtin_macros/src/deriving/hash.rs
index 32ae3d3447896..9aa170bec14d8 100644
--- a/compiler/rustc_builtin_macros/src/deriving/hash.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/hash.rs
@@ -21,7 +21,6 @@ pub fn expand_deriving_hash(
     let arg = Path::new_local(typaram);
     let hash_trait_def = TraitDef {
         span,
-        attributes: Vec::new(),
         path,
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
diff --git a/compiler/rustc_expand/src/build.rs b/compiler/rustc_expand/src/build.rs
index fa3e2a4a5b81c..1f5cd8decbd86 100644
--- a/compiler/rustc_expand/src/build.rs
+++ b/compiler/rustc_expand/src/build.rs
@@ -106,14 +106,13 @@ impl<'a> ExtCtxt<'a> {
         &self,
         span: Span,
         ident: Ident,
-        attrs: Vec<ast::Attribute>,
         bounds: ast::GenericBounds,
         default: Option<P<ast::Ty>>,
     ) -> ast::GenericParam {
         ast::GenericParam {
             ident: ident.with_span_pos(span),
             id: ast::DUMMY_NODE_ID,
-            attrs: attrs.into(),
+            attrs: AttrVec::new(),
             bounds,
             kind: ast::GenericParamKind::Type { default },
             is_placeholder: false,
diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index 1a4786c9b0664..2a38713d43b8a 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -820,8 +820,6 @@ pub(crate) trait AttributesExt {
 
     fn inner_docs(&self) -> bool;
 
-    fn other_attrs(&self) -> Vec<ast::Attribute>;
-
     fn cfg(&self, tcx: TyCtxt<'_>, hidden_cfg: &FxHashSet<Cfg>) -> Option<Arc<Cfg>>;
 }
 
@@ -848,10 +846,6 @@ impl AttributesExt for [ast::Attribute] {
         self.iter().find(|a| a.doc_str().is_some()).map_or(true, |a| a.style == AttrStyle::Inner)
     }
 
-    fn other_attrs(&self) -> Vec<ast::Attribute> {
-        self.iter().filter(|attr| attr.doc_str().is_none()).cloned().collect()
-    }
-
     fn cfg(&self, tcx: TyCtxt<'_>, hidden_cfg: &FxHashSet<Cfg>) -> Option<Arc<Cfg>> {
         let sess = tcx.sess;
         let doc_cfg_active = tcx.features().doc_cfg;