gnu: Remove rust-digest-0.7.

* gnu/packages/crates-crypto.scm (rust-digest-0.7): Delete variable.

Change-Id: I260fba2d1b590c2b14f30a3884e1e27d04e23e42

gnu/packages/crates-crypto.scm

@@ -1905,23 +1905,6 @@ ciphers implementations.")
        (("rust-blobby" ,rust-blobby-0.1)
         ("rust-generic-array" ,rust-generic-array-0.12))))))
 
-(define-public rust-digest-0.7
-  (package
-    (inherit rust-digest-0.9)
-    (name "rust-digest")
-    (version "0.7.6")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "digest" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "142vdpvkqlqk9s1dcgpqb2wz76n5a39gjnk68p0zkflc58j75c03"))))
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-generic-array" ,rust-generic-array-0.9))))))
-
 (define-public rust-digest-0.6
   (package
     (name "rust-digest")