gnu: intel-mpi-benchmarks: Merge with "imb-openmpi".

* gnu/packages/mpi.scm (intel-mpi-benchmarks): Remove.
* gnu/packages/benchmark.scm (imb): Rename to...
(intel-mpi-benchmarks): ... this.  Change 'name'.  Update to 2019.3.
[arguments]: Remove 'build phase.  Rewrite 'install phase.  Pass
 #:parallel-build? and #:make-flags.
(intel-mpi-benchmarks/openmpi): New variable.
(imb-openmpi): Rewrite in terms of 'deprecated-package'.

gnu/packages/mpi.scm

@@ -29,7 +29,6 @@
   #:use-module ((guix licenses)
                 #:hide (expat))
   #:use-module (guix download)
-  #:use-module (guix git-download)
   #:use-module (guix utils)
   #:use-module (guix deprecation)
   #:use-module (guix build-system gnu)
@@ -357,57 +356,6 @@ only provides @code{MPI_THREAD_FUNNELED}.")))
      (setenv "UCX_LOG_LEVEL" "error")
      #t))
 
-(define-public intel-mpi-benchmarks
-  (package
-    (name "intel-mpi-benchmarks")
-    (version "2019.3")
-    (source (origin
-              (method git-fetch)
-              (uri (git-reference
-                    (url "https://github.com/intel/mpi-benchmarks.git")
-                    (commit (string-append "IMB-v" version))))
-              (file-name (git-file-name name version))
-              (sha256
-               (base32
-                "0si5xi6ilhd3w0gbsg124589pvp094hvf366rvjjb9pi7pdk5p4i"))))
-    (build-system gnu-build-system)
-    (arguments
-     '(#:phases (modify-phases %standard-phases
-                  (delete 'configure)
-                  (delete 'check)
-                  (replace 'install
-                    (lambda* (#:key outputs #:allow-other-keys)
-                      (define (benchmark? file stat)
-                        (and (string-prefix? "IMB-" (basename file))
-                             (executable-file? file)))
-
-                      (let* ((out (assoc-ref outputs "out"))
-                             (bin (string-append out "/bin")))
-                        (for-each (lambda (file)
-                                    (install-file file bin))
-                                  (find-files "." benchmark?))
-                        #t))))
-
-       ;; The makefile doesn't express all the dependencies, it seems.
-       #:parallel-build? #t
-
-       #:make-flags (list (string-append "CC="
-                                         (assoc-ref %build-inputs "openmpi")
-                                         "/bin/mpicc")
-                          (string-append "CXX="
-                                         (assoc-ref %build-inputs "openmpi")
-                                         "/bin/mpicxx"))))
-    (inputs
-     `(("openmpi" ,openmpi)))
-    (home-page "https://github.com/intel/mpi-benchmarks")
-    (synopsis "Benchmarks for the Message Passing Interface (MPI)")
-    (description
-     "Intel MPI Benchmarks (IMB) provides a set of elementary benchmarks that
-conform with versions 1, 2, and 3 of the Message Passing Interface (MPI).")
-    (license
-     (fsf-free "https://directory.fsf.org/wiki/License:CPL-1.0"
-               "https://www.gnu.org/licenses/license-list.html#CommonPublicLicense10"))))
-
 (define-public python-mpi4py
   (package
     (name "python-mpi4py")