gnu: Remove qemu-minimal-2.10.

* gnu/packages/virtualization.scm (qemu-minimal-2.10): Remove variable.
* gnu/packages/debug.scm (qemu-for-american-fuzzy-lop): New variable.
(american-fuzzy-lop)[inputs]: Remove custom-qemu and add
qemu-for-american-fuzzy-lop.
[arguments]: Adjust reference to QEMU in the 'install-qemu' phase.

gnu/packages/virtualization.scm

@@ -284,34 +284,6 @@ server and embedded PowerPC, and S390 guests.")
                   '("libusb" "mesa" "sdl2" "spice" "virglrenderer" "gtk+"
                     "usbredir" "libdrm" "libepoxy" "pulseaudio" "vde2")))))
 
-;; The GRUB test suite fails with later versions of Qemu, so we
-;; keep it at 2.10 for now.  See
-;; <https://lists.gnu.org/archive/html/bug-grub/2018-02/msg00004.html>.
-;; This package is hidden since we do not backport updates to it.
-(define-public qemu-minimal-2.10
-  (hidden-package
-   (package
-    (inherit qemu-minimal)
-    (version "2.10.2")
-    (source (origin
-             (method url-fetch)
-             (uri (string-append "https://download.qemu.org/qemu-"
-                                 version ".tar.xz"))
-             (sha256
-              (base32
-               "17w21spvaxaidi2am5lpsln8yjpyp2zi3s3gc6nsxj5arlgamzgw"))
-             (patches
-              (search-patches "qemu-glibc-2.27.patch"))))
-    ;; qemu-minimal-2.10 needs Python 2. Remove below once no longer necessary.
-    (native-inputs `(("python-2" ,python-2)
-                     ,@(fold alist-delete (package-native-inputs qemu-minimal)
-                             '("python-wrapper" "python-sphinx"))))
-    (inputs
-     (fold alist-delete (package-inputs qemu-minimal)
-           ;; Disable seccomp support, because it's not required for the GRUB
-           ;; test suite, and because it fails with libseccomp 2.4.2 and later.
-           '("libseccomp"))))))
-
 (define-public libosinfo
   (package
     (name "libosinfo")