actually, remove rustc-workspace-hack dependency too

Author: klensy

Cargo.toml

@@ -35,11 +35,6 @@ walkdir = "2.3"
 # This is used by the `collect-metadata` alias.
 filetime = "0.2"
 
-# A noop dependency that changes in the Rust repository, it's a bit of a hack.
-# See the `src/tools/rustc-workspace-hack/README.md` file in `rust-lang/rust`
-# for more information.
-rustc-workspace-hack = "1.0"
-
 # UI test dependencies
 clap = { version = "4.1.4", features = ["derive"] }
 clippy_utils = { path = "clippy_utils" }