gnu: Remove rust-rustc-ap-serialize-654.

* gnu/packages/crates-io.scm (rust-rustc-ap-serialize-654): Delete variable.

gnu/packages/crates-io.scm

@@ -52121,34 +52121,6 @@ It is automatically published using the compiler repository at
 @url{https://www.github.com/rust-lang/rust}.")
     (license (list license:expat license:asl2.0))))
 
-(define-public rust-rustc-ap-serialize-654
-  (package
-    (name "rust-rustc-ap-serialize")
-    (version "654.0.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "rustc-ap-serialize" version))
-       (file-name
-        (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "1vwfa3q4f9k0nfryr53jnwmf8vhaq7ijbgw8449nx467dr98yvkm"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-indexmap" ,rust-indexmap-1)
-        ("rust-smallvec" ,rust-smallvec-1))))
-    (home-page "https://github.com/alexcrichton/rustc-auto-publish")
-    (synopsis
-     "Automatically published versions of the serialize crate used in rustc")
-    (description
-     "Use the serialize library used in the Rust compiler with this crate.
-It is automatically published using the compiler repository at
-@url{https://www.github.com/rust-lang/rust}")
-    (license (list license:expat license:asl2.0))))
-
 (define-public rust-rustc-demangle-0.1
   (package
     (name "rust-rustc-demangle")