From 2bb92aa02ff98e13970602e7a7f9555050f1dbe7 Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Mon, 3 Jun 2019 11:36:19 +0100
Subject: [PATCH] rustc: remove `ArgSource`

`ArgSource` is no longer used anywhere, so it can be removed.
---
 src/librustc/hir/lowering.rs |  2 --
 src/librustc/hir/mod.rs      | 10 ----------
 2 files changed, 12 deletions(-)

diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index ab7a854112661..14a6e93341e32 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -2285,7 +2285,6 @@ impl<'a> LoweringContext<'a> {
         hir::Arg {
             hir_id: self.lower_node_id(arg.id),
             pat: self.lower_pat(&arg.pat),
-            source: hir::ArgSource::Normal,
         }
     }
 
@@ -3091,7 +3090,6 @@ impl<'a> LoweringContext<'a> {
                 let new_argument = hir::Arg {
                     hir_id: argument.hir_id,
                     pat: new_argument_pat,
-                    source: hir::ArgSource::AsyncFn
                 };
 
                 if is_simple_argument {
diff --git a/src/librustc/hir/mod.rs b/src/librustc/hir/mod.rs
index eb338482eba91..65fc56f2c4878 100644
--- a/src/librustc/hir/mod.rs
+++ b/src/librustc/hir/mod.rs
@@ -1929,16 +1929,6 @@ pub struct InlineAsm {
 pub struct Arg {
     pub pat: P<Pat>,
     pub hir_id: HirId,
-    pub source: ArgSource,
-}
-
-/// Represents the source of an argument in a function header.
-#[derive(Clone, RustcEncodable, RustcDecodable, Debug, HashStable)]
-pub enum ArgSource {
-    /// Argument as specified by the user.
-    Normal,
-    /// Generated argument from `async fn` lowering.
-    AsyncFn,
 }
 
 /// Represents the header (not the body) of a function declaration.