gnu: Remove rust-vec-arena-1.

* gnu/packages/crates-io.scm (rust-vec-arena-1): Delete variable.

Change-Id: I123adeead95ad55bc139c9b2e9603025f09b33c1

gnu/packages/crates-io.scm

@@ -74616,24 +74616,6 @@ for @code{Valuable} types.")
     (license (list license:asl2.0
                    license:expat))))
 
-(define-public rust-vec-arena-1
-  (package
-    (name "rust-vec-arena")
-    (version "1.0.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "vec-arena" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "07866gmvn4cf2656bjf75nrmbnw4cj0cyqkv2wlmavzw5ndipz7a"))))
-    (build-system cargo-build-system)
-    (home-page "https://github.com/smol-rs/vec-arena")
-    (synopsis "Simple object arena")
-    (description
-     "This package provides a simple object arena.")
-    (license (list license:asl2.0 license:expat))))
-
 (define-public rust-vec-map-0.8
   (package
     (name "rust-vec-map")