flatpak: remove libhandy as it is part of the SDK

sm.puri.Calls.json

@@ -85,23 +85,6 @@
                 }
             ]
         },
-        {
-            "name" : "libhandy",
-            "buildsystem" : "meson",
-            "config-opts" : [
-                "-Dglade_catalog=disabled"
-            ],
-            "sources" : [
-                {
-                    "type" : "archive",
-                    "url" : "https://download.gnome.org/sources/libhandy/1.0/libhandy-1.0.0.tar.xz",
-                    "sha256" : "a9398582f47b7d729205d6eac0c068fef35aaf249fdd57eea3724f8518d26699"
-                }
-            ],
-            "cleanup" : [
-                "/bin"
-            ]
-        },
         {
             "name" : "boost",
             "buildsystem" : "simple",