packages: Remove 'origin-sha256' procedure.

* guix/packages.scm (origin-sha256): Remove procedure.
* tests/import-utils.scm (test-import-utils)
[alist->package with explicit source]: Use content-hash-value.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

guix/packages.scm

@@ -74,7 +74,6 @@
             origin-uri
             origin-method
             origin-hash
-            origin-sha256                         ;deprecated
             origin-file-name
             origin-actual-file-name
             origin-patches
@@ -346,14 +345,6 @@ as base32.  Otherwise, it must be a bytevector."
 specifications to 'hash'."
   (origin-compatibility-helper (fields ...) ()))
 
-(define-deprecated (origin-sha256 origin)
-  origin-hash
-  (let ((hash (origin-hash origin)))
-    (unless (eq? (content-hash-algorithm hash) 'sha256)
-      (raise (condition (&message
-                         (message (G_ "no SHA256 hash for origin"))))))
-    (content-hash-value hash)))
-
 (define (print-origin origin port)
   "Write a concise representation of ORIGIN to PORT."
   (match origin

tests/import-utils.scm

@@ -141,7 +141,7 @@ Differences are hard to spot, e.g. in CLOS vs. GOOPS."))
          (license:license? (package-license pkg))
          (build-system? (package-build-system pkg))
          (origin? (package-source pkg))
-         (equal? (origin-sha256 (package-source pkg))
+         (equal? (content-hash-value (origin-hash (package-source pkg)))
                  (base32 "0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i")))))
 
 (test-equal "alist->package with false license"  ;<https://bugs.gnu.org/30470>