gnu: Remove gtksourceview-2.

The variable has no dependents anymore, and we carry three more
recent versions.

* gnu/packages/gtk.scm (gtksourceview-2): Delete variable.

Change-Id: I9258c2d7294c8df347e5bb1daea588f82f8f8d58

gnu/packages/gtk.scm

@@ -561,69 +561,6 @@ graph-like environments, e.g. modular synths or finite state machine
 diagrams.")
     (license license:gpl3+)))
 
-(define-public gtksourceview-2
-  (package
-    (name "gtksourceview")
-    (version "2.10.5")   ;this is the last version which builds against gtk+2
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "mirror://gnome/sources/" name "/"
-                                  (version-major+minor version)  "/"
-                                  name "-" version ".tar.bz2"))
-              (sha256
-               (base32
-                "07hrabhpl6n8ajz10s0d960jdwndxs87szxyn428mpxi8cvpg1f5"))
-              (patches
-               (search-patches
-                "gtksourceview-2-add-default-directory.patch"))))
-    (build-system gnu-build-system)
-    (native-inputs
-     (list intltool
-           `(,glib "bin")               ; for glib-genmarshal, etc.
-           pkg-config
-           ;; For testing.
-           xorg-server-for-tests
-           shared-mime-info))
-    (propagated-inputs
-     ;; As per the pkg-config file.
-     `(("gtk" ,gtk+-2)
-       ("libxml2" ,libxml2)))
-    (arguments
-     (list
-      ;; Fix build with GCC 14.
-      #:configure-flags #~(list "CFLAGS=-Wno-error=incompatible-pointer-types")
-      #:phases
-      ;; Unfortunately, some of the tests in "make check" are highly dependent
-      ;; on the environment therefore, some black magic is required.
-      #~(modify-phases %standard-phases
-          (add-before 'check 'start-xserver
-            (lambda* (#:key native-inputs inputs #:allow-other-keys)
-              ;; There must be a running X server and make check doesn't
-              ;; start one.  Therefore we must do it.
-              (system (format #f "~a :1 &"
-                              (search-input-file (or native-inputs inputs)
-                                                 "bin/Xvfb")))
-              (setenv "DISPLAY" ":1")
-
-              ;; The .lang files must be found in
-              ;; $XDG_DATA_HOME/gtksourceview-2.0
-              (system "ln -s gtksourceview gtksourceview-2.0")
-              (setenv "XDG_DATA_HOME" (getcwd))
-
-              ;; Finally, the mimetypes must be available.
-              (setenv "XDG_DATA_DIRS"
-                      (string-append
-                       #$(this-package-native-input "shared-mime-info")
-                       "/share")))))))
-    (synopsis "Widget that extends the standard GTK+ 2.x 'GtkTextView' widget")
-    (description
-     "GtkSourceView is a portable C library that extends the standard GTK+
-framework for multiline text editing with support for configurable syntax
-highlighting, unlimited undo/redo, search and replace, a completion framework,
-printing and other features typical of a source code editor.")
-    (license license:lgpl2.0+)
-    (home-page "https://developer.gnome.org/gtksourceview/")))
-
 (define-public gtksourceview
   (package
     (name "gtksourceview")