gnu: Remove python-pyblake2.

This package no longer builds with Python 3.11.  Since Python 3.6 and later
have native support for BLAKE2 in hashlib derived from this implementation,
with compatible API, it is no big loss to remove this package.

* gnu/packages/python-crypto.scm (python-pyblake2): Remove variable.

Change-Id: Ia540ce0ee2cae10ee5fb5527b5fc90bb6db2be9b

gnu/packages/python-crypto.scm

@@ -165,32 +165,6 @@ useful for a wide range of tasks, from verifying a hash found in /etc/shadow,
 to providing full-strength password hashing for multi-user application.")
     (license license:bsd-3)))
 
-(define-public python-pyblake2
-  (package
-    (name "python-pyblake2")
-    (version "1.1.2")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (pypi-uri "pyblake2" version))
-       (sha256
-        (base32
-         "0gz9hgznv5zw4qjq43xa56y0yikimx30gffvibxzm0nv5sq7xk2w"))))
-    (build-system python-build-system)
-    (home-page "https://github.com/dchest/pyblake2")
-    (synopsis "BLAKE2 hash function for Python")
-    (description "BLAKE2 is a cryptographic hash function, which offers
-stronger security while being as fast as MD5 or SHA-1, and comes in two
-flavors: @code{BLAKE2b}, optimized for 64-bit platforms and produces digests
-of any size between 1 and 64 bytes, and @code{BLAKE2s}, optimized for 8- to
-32-bit platforms and produces digests of any size between 1 and 32 bytes.
-
-This package provides a Python interface for BLAKE2.")
-    ;; The COPYING file declares it as public domain, with the option to
-    ;; alternatively use and redistribute it under a variety of permissive
-    ;; licenses. cc0 is explicitly mentioned in setup.py and pyblake2module.c.
-    (license (list license:public-domain license:cc0))))
-
 (define-public python-paramiko
   (package
     (name "python-paramiko")