rustc: Remove needless lifetimes

3 files changed, 7 insertions, 10 deletions

diff --git a/compiler/rustc_mir_build/src/thir/cx/mod.rs b/compiler/rustc_mir_build/src/thir/cx/mod.rs
index b5c4b7b137d..a355e1bdab5 100644
--- a/compiler/rustc_mir_build/src/thir/cx/mod.rs
+++ b/compiler/rustc_mir_build/src/thir/cx/mod.rs
@@ -18,10 +18,10 @@ use rustc_middle::thir::*;
 use rustc_middle::ty::{self, RvalueScopes, TyCtxt};
 use rustc_span::Span;
 
-pub(crate) fn thir_body<'tcx>(
-    tcx: TyCtxt<'tcx>,
+pub(crate) fn thir_body(
+    tcx: TyCtxt<'_>,
     owner_def: ty::WithOptConstParam<LocalDefId>,
-) -> Result<(&'tcx Steal<Thir<'tcx>>, ExprId), ErrorGuaranteed> {
+) -> Result<(&Steal<Thir<'_>>, ExprId), ErrorGuaranteed> {
     let hir = tcx.hir();
     let body = hir.body(hir.body_owned_by(owner_def.did));
     let mut cx = Cx::new(tcx, owner_def);
@@ -52,10 +52,7 @@ pub(crate) fn thir_body<'tcx>(
     Ok((tcx.alloc_steal_thir(cx.thir), expr))
 }
 
-pub(crate) fn thir_tree<'tcx>(
-    tcx: TyCtxt<'tcx>,
-    owner_def: ty::WithOptConstParam<LocalDefId>,
-) -> String {
+pub(crate) fn thir_tree(tcx: TyCtxt<'_>, owner_def: ty::WithOptConstParam<LocalDefId>) -> String {
     match thir_body(tcx, owner_def) {
         Ok((thir, _)) => format!("{:#?}", thir.steal()),
         Err(_) => "error".into(),
diff --git a/compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs b/compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
index 7e1f708b0d6..6470efab2e9 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
@@ -70,7 +70,7 @@ mod fallback_to_const_ref {
     /// hoops to get a reference to the value.
     pub(super) struct FallbackToConstRef(());
 
-    pub(super) fn fallback_to_const_ref<'tcx>(c2p: &super::ConstToPat<'tcx>) -> FallbackToConstRef {
+    pub(super) fn fallback_to_const_ref(c2p: &super::ConstToPat<'_>) -> FallbackToConstRef {
         assert!(c2p.behind_reference.get());
         FallbackToConstRef(())
     }
diff --git a/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs b/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
index 18e9c69c487..a95349d7670 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
@@ -404,7 +404,7 @@ impl SplitIntRange {
     }
 
     /// Iterate over the contained ranges.
-    fn iter<'a>(&'a self) -> impl Iterator<Item = IntRange> + Captures<'a> {
+    fn iter(&self) -> impl Iterator<Item = IntRange> + Captures<'_> {
         use IntBorder::*;
 
         let self_range = Self::to_borders(self.range.clone());
@@ -612,7 +612,7 @@ impl SplitVarLenSlice {
     }
 
     /// Iterate over the partition of this slice.
-    fn iter<'a>(&'a self) -> impl Iterator<Item = Slice> + Captures<'a> {
+    fn iter(&self) -> impl Iterator<Item = Slice> + Captures<'_> {
         let smaller_lengths = match self.array_len {
             // The only admissible fixed-length slice is one of the array size. Whether `max_slice`
             // is fixed-length or variable-length, it will be the only relevant slice to output