Remove unused field of RegionVariableOrigin

Author: matthewjasper

compiler/rustc_infer/src/infer/error_reporting/mod.rs

@@ -2528,7 +2528,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
             infer::MiscVariable(_) => String::new(),
             infer::PatternRegion(_) => " for pattern".to_string(),
             infer::AddrOfRegion(_) => " for borrow expression".to_string(),
-            infer::Autoref(_, _) => " for autoref".to_string(),
+            infer::Autoref(_) => " for autoref".to_string(),
             infer::Coercion(_) => " for automatic coercion".to_string(),
             infer::LateBoundRegion(_, br, infer::FnCall) => {
                 format!(" for lifetime parameter {}in function call", br_string(br))

compiler/rustc_infer/src/infer/mod.rs

@@ -459,7 +459,7 @@ pub enum RegionVariableOrigin {
     AddrOfRegion(Span),
 
     /// Regions created as part of an autoref of a method receiver
-    Autoref(Span, ty::AssocItem),
+    Autoref(Span),
 
     /// Regions created as part of an automatic coercion
     Coercion(Span),
@@ -1848,7 +1848,7 @@ impl RegionVariableOrigin {
             MiscVariable(a)
             | PatternRegion(a)
             | AddrOfRegion(a)
-            | Autoref(a, _)
+            | Autoref(a)
             | Coercion(a)
             | EarlyBoundRegion(a, ..)
             | LateBoundRegion(a, ..)

compiler/rustc_typeck/src/check/method/confirm.rs

@@ -162,7 +162,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
 
         match &pick.autoref_or_ptr_adjustment {
             Some(probe::AutorefOrPtrAdjustment::Autoref { mutbl, unsize }) => {
-                let region = self.next_region_var(infer::Autoref(self.span, pick.item));
+                let region = self.next_region_var(infer::Autoref(self.span));
                 target = self.tcx.mk_ref(region, ty::TypeAndMut { mutbl: *mutbl, ty: target });
                 let mutbl = match mutbl {
                     hir::Mutability::Not => AutoBorrowMutability::Not,