[gnome-contacts] Stop using HANDY_USE_UNSTABLE_API

[Niels De Graef <nielsdg src gnome org>]

commit 74a488d50bccd246fdbfa9f81744281e6ab946c6
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Aug 7 14:13:46 2020 +0200

    Stop using HANDY_USE_UNSTABLE_API
    
    It isn't needed anymore since libhandy 0.90.0.

 src/meson.build | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/meson.build b/src/meson.build
index b59578a8..63b28478 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -26,7 +26,6 @@ contacts_vala_args = [
 contacts_c_args = [
   '-include', 'config.h',
   '-DGNOME_DESKTOP_USE_UNSTABLE_API',
-  '-DHANDY_USE_UNSTABLE_API',
   '-DLOCALEDIR="@0@"'.format(locale_dir),
 ]