gnu: Remove gtklick.

* gnu/packages/music.scm (gtklick): Delete variable.

gnu/packages/music.scm

@@ -1274,52 +1274,6 @@ (define-public glyr
 biographies, reviews and more.")
     (license license:lgpl3+)))
 
-(define-public gtklick
-  (package
-    (name "gtklick")
-    (version "0.6.4")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "http://das.nasophon.de/download/gtklick-"
-                                  version ".tar.gz"))
-              (sha256
-               (base32
-                "0dq1km6njnzsqdqyf6wzir9g733z0mc9vmxfg2383k3c2a2di6bp"))))
-    (build-system python-build-system)
-    (arguments
-     `(#:tests? #f ; no tests
-       #:python ,python-2
-       #:phases
-       (modify-phases %standard-phases
-         (add-before 'build 'add-sitedirs
-           ;; .pth files are not automatically interpreted unless the
-           ;; directories containing them are added as "sites".  The directories
-           ;; are then added to those in the PYTHONPATH.  This is required for
-           ;; the operation of pygtk.
-           (lambda _
-             (substitute* "gtklick/gtklick.py"
-               (("import pygtk")
-                "import pygtk, site, sys
-for path in [path for path in sys.path if 'site-packages' in path]: site.addsitedir(path)"))))
-         (add-after 'unpack 'inject-store-path-to-klick
-           (lambda* (#:key inputs #:allow-other-keys)
-             (substitute* "gtklick/klick_backend.py"
-               (("KLICK_PATH = 'klick'")
-                (string-append "KLICK_PATH = '"
-                               (assoc-ref inputs "klick")
-                               "/bin/klick'")))
-             #t)))))
-    (inputs
-     (list klick python2-pyliblo python2-pygtk))
-    (native-inputs
-     `(("gettext" ,gettext-minimal)))
-    (home-page "http://das.nasophon.de/gtklick/")
-    (synopsis "Simple metronome with an easy-to-use graphical interface")
-    (description
-     "Gtklick is a simple metronome with an easy-to-use graphical user
-interface.  It is implemented as a frontend to @code{klick}.")
-    (license license:gpl2+)))
-
 (define-public lingot
   (package
     (name "lingot")