drop python2 makedep; only needed to run tests we don't use

PKGBUILD

@@ -2,13 +2,13 @@
 
 pkgname=libgnome-keyring
 pkgver=3.12.0+13+g4f8ab73
-pkgrel=2
+pkgrel=3
 pkgdesc="GNOME keyring client library (deprecated)"
 url="https://gitlab.gnome.org/GNOME/libgnome-keyring"
 arch=(x86_64)
 license=(GPL LGPL)
 depends=(dbus glib2 libgcrypt)
-makedepends=(intltool gobject-introspection vala python2 git gnome-common)
+makedepends=(intltool gobject-introspection vala git gnome-common)
 optdepends=('org.freedesktop.secrets: secret storage backend')
 _commit=4f8ab73d19e5621b06102dc29ad880e74aeec573  # master
 source=("git+https://gitlab.gnome.org/GNOME/libgnome-keyring.git#commit=$_commit")