gnu: Remove rust-rustc-workspace-hack-1.

* gnu/packages/crates-io.scm (rust-rustc-workspace-hack-1): Delete variable.

Change-Id: I7fa91cf4b5b59ce5b8c62d1ab490bbd2495a49c7

gnu/packages/crates-io.scm

@@ -55311,26 +55311,6 @@ rust-lang/rust integration.")
     (license (list license:asl2.0
                    license:expat))))
 
-(define-public rust-rustc-workspace-hack-1
-  (package
-    (name "rust-rustc-workspace-hack")
-    (version "1.0.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "rustc-workspace-hack" version))
-       (file-name
-        (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "1yx8l58n2vb2ldpi3z1jn4dmi5hnxvikbhpd5lilpdvkl7xd4wgw"))))
-    (build-system cargo-build-system)
-    (home-page "https://crates.io/crates/rustc-workspace-hack")
-    (synopsis "Hack for the compiler's own build system")
-    (description "Hack for the compiler's own build system.  It is used by
-@code{cargo}.")
-    (license (list license:expat license:asl2.0))))
-
 (define-public rust-rustc-std-workspace-std-1
   (package
     (name "rust-rustc-std-workspace-std")