From 0a47a38fd0099f654a1cd38e1de6bbb641863f13 Mon Sep 17 00:00:00 2001
From: Caleb Cartwright <caleb.cartwright@outlook.com>
Date: Tue, 9 Feb 2021 19:56:18 -0600
Subject: [PATCH] remove unused backtrace refs

---
 Cargo.lock                 | 4 ----
 Cargo.toml                 | 6 ------
 src/tools/tidy/src/deps.rs | 1 -
 3 files changed, 11 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index bc5f2a0af93..a9e65ffc391 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5581,7 +5581,3 @@ checksum = "39f0c922f1a334134dc2f7a8b67dc5d25f0735263feec974345ff706bcf20b0d"
 dependencies = [
  "linked-hash-map",
 ]
-
-[[patch.unused]]
-name = "backtrace"
-version = "0.3.55"
diff --git a/Cargo.toml b/Cargo.toml
index f3b2e0f740d..f961d3e9b97 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -106,11 +106,5 @@ rustc-std-workspace-core = { path = 'library/rustc-std-workspace-core' }
 rustc-std-workspace-alloc = { path = 'library/rustc-std-workspace-alloc' }
 rustc-std-workspace-std = { path = 'library/rustc-std-workspace-std' }
 
-# This crate's integration with libstd is a bit wonky, so we use a submodule
-# instead of a crates.io dependency. Make sure everything else in the repo is
-# also using the submodule, however, so we can avoid duplicate copies of the
-# source code for this crate.
-backtrace = { path = "library/backtrace" }
-
 [patch."https://github.com/rust-lang/rust-clippy"]
 clippy_lints = { path = "src/tools/clippy/clippy_lints" }
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index 4b521985ca1..f127086724f 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -67,7 +67,6 @@ const PERMITTED_DEPENDENCIES: &[&str] = &[
     "arrayvec",
     "atty",
     "autocfg",
-    "backtrace",
     "bitflags",
     "block-buffer",
     "block-padding",