gnu: Remove rust-sourcefile-0.1.

* gnu/packages/crates-io.scm (rust-sourcefile-0.1): Delete variable.

gnu/packages/crates-io.scm

@@ -56534,30 +56534,6 @@ (define-public rust-socks-0.3
      "You can write SOCKS proxy clients with this crate.")
     (license (list license:asl2.0 license:expat))))
 
-(define-public rust-sourcefile-0.1
-  (package
-    (name "rust-sourcefile")
-    (version "0.1.4")
-    (source
-      (origin
-        (method url-fetch)
-        (uri (crate-uri "sourcefile" version))
-        (file-name (string-append name "-" version ".tar.gz"))
-        (sha256
-         (base32
-          "1lwa6973zs4bgj29my7agfjgk4nw9hp6j7dfnr13nid85fw7rxsb"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:cargo-development-inputs
-       (("rust-tempfile" ,rust-tempfile-3))))
-    (home-page "https://github.com/derekdreery/sourcefile-rs")
-    (synopsis "Concatenate source from multiple files")
-    (description
-     "A library for concatenating source from multiple files, whilst keeping
-track of where each new file and line starts.")
-    (license (list license:asl2.0
-                   license:expat))))
-
 (define-public rust-sourcemap-6
   (package
     (name "rust-sourcemap")