gnu: Remove meson-0.59 workarounds.

Mostly automated with the following command:

$ grep --include='*.scm' '#:meson ,meson-0.59' -rl \
    | xargs sed -z 's/#:meson[^\n]*\s*//' -i

* gnu/packages/freedesktop.scm (malcontent)
(accountsservice): Delete #:meson argument.
* gnu/packages/games.scm (gnome-2048): Likewise.
* gnu/packages/geo.scm (gnome-maps): Likewise.
* gnu/packages/gnome.scm (gnome-photos, gnome-music)
(gnome-initial-setup, gnome-user-share, gnome-characters)
(gnome-disk-utility, gnome-font-viewer, evince, glade3)
(gnome-mines, gnome-sudoku, gnome-settings-daemon, devhelp)
(totem, eog, gvfs, simple-scan, epiphany, gnome-session, gedit)
(network-manager-applet, gnome-control-center, gnome-shell, nautilus)
(gnome-default-applications, gnome-weather, gnome-tweaks, cheese, gthumb)
(gitg, polari, gnome-boxes, gtranslator): Likewise.
* gnu/packages/gtk.scm: (gtkmm-3): Likewise.
* gnu/packages/pdf.scm (zathura): Likewise.
* gnu/packages/photo.scm (entangle): Likewise.
* gnu/packages/video.scm (pitivi): Likewise.
* gnu/packages/virtualization.scm (libvirt-glib): Likewise.

gnu/packages/gtk.scm

@@ -1809,12 +1809,6 @@ tutorial.")
                        name "-" version ".tar.xz"))
        (sha256
         (base32 "1ri2msp3cmzi6r65ghwb8gfavfaxv0axpwi3q60nm7v8hvg36qw5"))))
-    (arguments
-     (substitute-keyword-arguments (package-arguments gtkmm)
-       ;; Use meson 0.59 to workaround a new issue with meson 0.60 (see:
-       ;; https://github.com/mesonbuild/meson/issues/9350#issuecomment-953799600).
-       ((#:meson _ #f)
-        meson-0.59)))
     (propagated-inputs
      `(("atkmm-2.28" ,atkmm-2.28)
        ("cairomm-1.14" ,cairomm-1.14)