gnu: libb2: Update to 0.98.

* gnu/packages/crypto.scm (libb2): Update to 0.98.
[source]: Use URL-FETCH.
[native-inputs]: Remove.

gnu/packages/crypto.scm

@@ -668,25 +668,18 @@ data on your platform, so the seed itself will be as random as possible.
     (license (list license:boost1.0 license:public-domain))))
 
 (define-public libb2
-  (let ((revision "1")                  ; upstream doesn't ‘do’ releases
-        (commit "60ea749837362c226e8501718f505ab138e5c19d"))
   (package
     (name "libb2")
-      (version (git-version "0.0.0" revision commit))
+    (version "0.98")
     (source (origin
-                (method git-fetch)
-                (uri (git-reference
-                      (url "https://github.com/BLAKE2/libb2")
-                      (commit commit)))
-                (file-name (git-file-name name version))
+              (method url-fetch)
+              (uri (string-append
+                    "https://github.com/BLAKE2/libb2/releases/download/v"
+                    version "/libb2-" version ".tar.gz"))
               (sha256
                (base32
-                  "07a2m8basxrsj9dsp5lj24y8jraj85lfy56756a7za1nfkgy04z7"))))
+                "0vq39cvwy05754l565xl11rqr2jvjb6ykjzca886vi9vm71y0sg8"))))
     (build-system gnu-build-system)
-      (native-inputs
-       `(("autoconf" ,autoconf)
-         ("automake" ,automake)
-         ("libtool" ,libtool)))
     (arguments
      `(#:configure-flags
        (list
@@ -709,7 +702,7 @@ implementation for the processor it is run on.
 that are faster than MD5, SHA-1, SHA-2, and SHA-3, yet are at least as secure
 as the latest standard, SHA-3.  It is an improved version of the SHA-3 finalist
 BLAKE.")
-      (license license:public-domain))))
+    (license license:public-domain)))
 
 (define-public rhash
   (package