chore: remove `rustc-workspace-hack`

Co-authored-by: Scott Schafer <schaferjscott@gmail.com>
Co-authored-by: Eric Huss <eric@huss.org>

3 files changed, 0 insertions, 45 deletions

diff --git a/src/tools/rustc-workspace-hack/Cargo.toml b/src/tools/rustc-workspace-hack/Cargo.toml
deleted file mode 100644
index 5d5d57fc9ef..00000000000
--- a/src/tools/rustc-workspace-hack/Cargo.toml
+++ /dev/null
@@ -1,19 +0,0 @@
-[package]
-name = "rustc-workspace-hack"
-version = "1.0.0"
-license = 'MIT OR Apache-2.0'
-description = """
-Hack for the compiler's own build system
-"""
-edition = "2021"
-
-[lib]
-path = "lib.rs"
-
-# For documentation about what this is and why in the world these dependencies
-# are appearing, see `README.md`.
-[dependencies]
-libc = { version = "0.2", features = ["extra_traits"] }
-serde_json = { version = "1.0.31", features = ["unbounded_depth"] }
-# Ensure default features of regex, which are disabled in some scenarios.
-regex = { version = "1.5.6" }
diff --git a/src/tools/rustc-workspace-hack/README.md b/src/tools/rustc-workspace-hack/README.md
deleted file mode 100644
index 3c61470358b..00000000000
--- a/src/tools/rustc-workspace-hack/README.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# `rustc-workspace-hack`
-
-This crate is a bit of a hack to make workspaces in rustc work a bit better.
-The rationale for this existence is a bit subtle, but the general idea is that
-we want commands like `./x.py build src/tools/{clippy,cargo}` to share as
-many dependencies as possible.
-
-Each invocation is a different invocation of Cargo, however. Each time Cargo
-runs a build it will re-resolve the dependency graph, notably selecting
-different features sometimes for each build.
-
-For example, let's say there's a very deep dependency like `winapi` in each of
-these builds. For Cargo, `winapi` has 33 features enabled. In Clippy, however,
-`winapi` has 22 features enabled. This means that building Cargo and then the
-Clippy will actually build winapi twice, which in turn will build duplicates
-of everything that depends on `winapi`. This is bad!
-
-The goal of this crate is to solve this problem and ensure that the resolved
-dependency graph for all of these tools is the same in the various subsets of
-each tool, notably enabling the same features of transitive dependencies.
-
-All tools vendored here depend on the `rustc-workspace-hack` crate on crates.io.
-When on crates.io this crate is an empty crate that is just a noop. We override
-it, however, in this workspace to this crate here, which means we can control
-crates in the dependency graph for each of these tools.
diff --git a/src/tools/rustc-workspace-hack/lib.rs b/src/tools/rustc-workspace-hack/lib.rs
deleted file mode 100644
index 44425d9c15f..00000000000
--- a/src/tools/rustc-workspace-hack/lib.rs
+++ /dev/null
@@ -1 +0,0 @@
-// intentionally left blank