gnu: python-pyopencl: Update to 2021.2.6.

* gnu/packages/opencl.scm (python-pyopencl)[version]: Update to
2021.2.6.
[source]: Point to new git repository.
[#:phases]: Remove unused phases.
[inputs]: Use unversioned opencl-headers.
[propagated-inputs]: Remove unused inputs.

gnu/packages/opencl.scm

@@ -364,44 +364,29 @@ A lexer, @code{pytools.lex}.
 (define-public python-pyopencl
   (package
     (name "python-pyopencl")
-    (version "2019.1.1")
+    (version "2021.2.6")
     (source
      (origin
-       ;; The tarball on PyPI lacks test programs such as
-       ;; 'pygpu_language_opencl.cpp' so fetch it from Git.
-       ;; XXX: The server at git.tiker.net is unreliable.
        (method git-fetch)
        (uri (git-reference
-             (url "http://git.tiker.net/trees/pyopencl.git")
+             (url "https://github.com/inducer/pyopencl.git")
              (commit (string-append "v" version))
              (recursive? #t)))
        (file-name (git-file-name name version))
        (sha256
         (base32
-         "12q0rs8yla571vcfpsh0mfrjbdiayv0hi8r1rq0f178m3i3qjz80"))))
+         "1s2cls7avxvf753zzpx422ikslaxdnm8rz58zg7mal15yak0wv2x"))))
     (build-system python-build-system)
     (arguments
-     '(#:phases (modify-phases %standard-phases
-                  (add-before 'build 'set-home
-                    (lambda _
-                      ;; Some of the Python build scripts expect 'HOME' to be
-                      ;; set.
-                      (setenv "HOME" (getcwd))
-                      #t)))
-
-       ;; Tests in 'compyte/ndarray/setup_opencl.py' appear to rely on
-       ;; 'nvcc', which is not an option.
-       #:tests? #f))
+     `(#:tests? #f)) ; Tests cannot find pygpu_language_opencl.cpp
     (inputs
-     `(("opencl-headers" ,opencl-headers-1.2)   ;POCL only supports OpenCL 1.2
+     `(("opencl-headers" ,opencl-headers)
        ("pybind11" ,pybind11)
        ("opencl-icd-loader" ,opencl-icd-loader)))                     ;libOpenCL
     (propagated-inputs
      `(("python-appdirs" ,python-appdirs)
-       ("python-decorator" ,python-decorator)
        ("python-numpy" ,python-numpy)
        ("python-pytools" ,python-pytools)
-       ("python-six" ,python-six)
        ("python-mako" ,python-mako)))
     (home-page "http://mathema.tician.de/software/pyopencl")
     (synopsis "Python wrapper for OpenCL")