diff --git a/src/librustdoc/clean/auto_trait.rs b/src/librustdoc/clean/auto_trait.rs
index eba7f8d3a8a..a33b3a9312e 100644
--- a/src/librustdoc/clean/auto_trait.rs
+++ b/src/librustdoc/clean/auto_trait.rs
@@ -634,7 +634,7 @@ impl<'a, 'tcx> AutoTraitFinder<'a, 'tcx> {
                                 // that we don't end up with duplicate bounds (e.g., for<'b, 'b>)
                                 for_generics.extend(p.generic_params.clone());
                                 p.generic_params = for_generics.into_iter().collect();
-                                self.is_fn_ty(&tcx, &p.trait_)
+                                self.is_fn_ty(tcx, &p.trait_)
                             }
                             _ => false,
                         };
@@ -681,7 +681,7 @@ impl<'a, 'tcx> AutoTraitFinder<'a, 'tcx> {
                                 } => {
                                     let mut new_trait_path = trait_path.clone();
 
-                                    if self.is_fn_ty(&tcx, trait_) && left_name == FN_OUTPUT_NAME {
+                                    if self.is_fn_ty(tcx, trait_) && left_name == FN_OUTPUT_NAME {
                                         ty_to_fn
                                             .entry(*ty.clone())
                                             .and_modify(|e| *e = (e.0.clone(), Some(rhs.clone())))
@@ -850,7 +850,7 @@ impl<'a, 'tcx> AutoTraitFinder<'a, 'tcx> {
         vec.sort_by_cached_key(|x| format!("{:?}", x))
     }
 
-    fn is_fn_ty(&self, tcx: &TyCtxt<'_, '_, '_>, ty: &Type) -> bool {
+    fn is_fn_ty(&self, tcx: TyCtxt<'_, '_, '_>, ty: &Type) -> bool {
         match &ty {
             &&Type::ResolvedPath { ref did, .. } => {
                 *did == tcx.require_lang_item(lang_items::FnTraitLangItem)
diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index b0a0b96f6b5..8232254cdec 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -4399,7 +4399,7 @@ where
 
 // Start of code copied from rust-clippy
 
-pub fn path_to_def_local(tcx: &TyCtxt<'_, '_, '_>, path: &[&str]) -> Option<DefId> {
+pub fn path_to_def_local(tcx: TyCtxt<'_, '_, '_>, path: &[&str]) -> Option<DefId> {
     let krate = tcx.hir().krate();
     let mut items = krate.module.item_ids.clone();
     let mut path_it = path.iter().peekable();
@@ -4424,7 +4424,7 @@ pub fn path_to_def_local(tcx: &TyCtxt<'_, '_, '_>, path: &[&str]) -> Option<DefI
     }
 }
 
-pub fn path_to_def(tcx: &TyCtxt<'_, '_, '_>, path: &[&str]) -> Option<DefId> {
+pub fn path_to_def(tcx: TyCtxt<'_, '_, '_>, path: &[&str]) -> Option<DefId> {
     let crates = tcx.crates();
 
     let krate = crates
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index bf9324606b5..2274f4e81d4 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -466,9 +466,9 @@ pub fn run_core(options: RustdocOptions) -> (clean::Crate, RenderInfo, RenderOpt
             };
 
             let send_trait = if crate_name == Some("core".to_string()) {
-                clean::path_to_def_local(&tcx, &["marker", "Send"])
+                clean::path_to_def_local(tcx, &["marker", "Send"])
             } else {
-                clean::path_to_def(&tcx, &["core", "marker", "Send"])
+                clean::path_to_def(tcx, &["core", "marker", "Send"])
             };
 
             let mut renderinfo = RenderInfo::default();