gnu: imagemagick: Remove graft.

Note that this commit does *not* integrate the fixes that were previously
applied via the graft.  This commit simply discards those fixes.  We will
address those security flaws, without grafting, in subsequent commits.

* gnu/packages/imagemagick.scm (imagemagick)[replacement]: Remove field.
(imagemagick/fixed): Remove variable.

gnu/packages/imagemagick.scm

@@ -51,7 +51,6 @@
     ;; maintained. Don't update to 7 until we've made sure that the ImageMagick
     ;; users are ready for the 7-series API.
     (version "6.9.11-48")
-    (replacement imagemagick/fixed)
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://imagemagick/ImageMagick-"
@@ -128,45 +127,6 @@ transform images, adjust image colors, apply various special effects, or draw
 text, lines, polygons, ellipses and Bézier curves.")
     (license (license:fsf-free "http://www.imagemagick.org/script/license.php"))))
 
-(define-public imagemagick/fixed
-  (package
-    (inherit imagemagick)
-    (name "imagemagick")
-    ;; 'g' for 'guix', appended character to retain version length so grafting
-    ;; works properly.
-    (version "6.9.12-2g")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "mirror://imagemagick/ImageMagick-"
-                                  ;; Hardcode the version here since we had to
-                                  ;; change it above.
-                                  "6.9.12-2.tar.xz"))
-              (sha256
-               (base32
-                "17da5zihz58qm41y61sbvw626m5xfwr2nzszlikrvxyq1j1q7asa"))))
-    (arguments
-     (substitute-keyword-arguments (package-arguments imagemagick)
-       ((#:phases phases)
-        `(modify-phases ,phases
-           (add-after 'install 'fix-compat-cheat-rename-so
-             (lambda* (#:key outputs #:allow-other-keys)
-               (with-directory-excursion
-                   (string-append (assoc-ref outputs "out")
-                                  "/lib")
-                 (symlink "libMagick++-6.Q16.so.9.0.0"
-                          "libMagick++-6.Q16.so.8.0.0")
-                 (symlink "libMagick++-6.Q16.so.9"
-                          "libMagick++-6.Q16.so.8")
-                 (symlink "libMagickCore-6.Q16.so.7.0.0"
-                          "libMagickCore-6.Q16.so.6.0.0")
-                 (symlink "libMagickCore-6.Q16.so.7"
-                          "libMagickCore-6.Q16.so.6")
-                 (symlink "libMagickWand-6.Q16.so.7.0.0"
-                          "libMagickWand-6.Q16.so.6.0.0")
-                 (symlink "libMagickWand-6.Q16.so.7"
-                          "libMagickWand-6.Q16.so.6"))
-               #t))))))))
-
 (define-public perl-image-magick
   (package
     (name "perl-image-magick")