gnu: Remove rust-directories-next-1.

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

gnu/packages/crates-io.scm

@@ -18694,27 +18694,6 @@ platform-specific standard locations of directories for config, cache and
 other data.")
     (license (list license:expat license:asl2.0))))
 
-(define-public rust-directories-next-1
-  (package
-    (inherit rust-directories-next-2)
-    (name "rust-directories-next")
-    (version "1.0.3")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "directories-next" version))
-       (file-name
-        (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "0mmym1h9vlyapwlzygfas3q9mx03mki8cnf5y1bmr713q7mwqa4a"))))
-    (arguments
-     `(#:cargo-inputs
-       (("rust-cfg-if" ,rust-cfg-if-1)
-        ("rust-dirs-sys" ,rust-dirs-sys-next-0.1))
-       #:cargo-development-inputs
-       (("rust-bencher" ,rust-bencher-0.1))))))
-
 (define-public rust-dirs-4
   (package
     (name "rust-dirs")