gnu: Remove vtk-7.

* gnu/packages/image-processing.scm (vtk-7): Delete variable.

Change-Id: I9b70e5923333fb15672f194b3e6c28f1d7b17a5c

gnu/packages/image-processing.scm

@@ -417,38 +417,6 @@ a suite of 3D interaction widgets, supports parallel processing, and
 integrates with various databases on GUI toolkits such as Qt and Tk.")
     (license license:bsd-3)))
 
-(define-public vtk-7
-  (package
-    (inherit vtk)
-    (version "7.1.1")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "https://vtk.org/files/release/"
-                                  (version-major+minor version)
-                                  "/VTK-" version ".tar.gz"))
-              (sha256
-               (base32
-                "0nm7xwwj7rnsxjdv2ssviys8nhci4n9iiiqm2y14s520hl2dsp1d"))
-              (patches (search-patches "vtk-7-python-compat.patch"
-                                       "vtk-7-hdf5-compat.patch"
-                                       "vtk-7-gcc-10-compat.patch"
-                                       "vtk-7-gcc-11-compat.patch"))))
-    (arguments
-     (substitute-keyword-arguments (package-arguments vtk)
-       ((#:configure-flags flags)
-        ;; Otherwise, the build would fail with: "error: invalid conversion
-        ;; from ‘const char*’ to ‘char*’ [-fpermissive]".
-        #~(cons "-DCMAKE_CXX_FLAGS=-fpermissive" #$flags))
-       ((#:phases phases)
-        #~(modify-phases #$phases
-            (add-after 'unpack 'remove-kernel-version
-              ;; Avoid embedding the kernel version for reproducible builds
-              (lambda _
-                (substitute*
-                    "ThirdParty/hdf5/vtkhdf5/config/cmake/libhdf5.settings.cmake.in"
-                  (("Host system: \\@CMAKE_HOST_SYSTEM\\@")
-                   "Host system: @CMAKE_SYSTEM_NAME@"))))))))))
-
 (define-public vktdiff
   (package
     (name "vtkdiff")