Remove support for older ostree without bundle support

This is not needed when we depend on 2016.5

app/xdg-app-builtins-build-bundle.c

@@ -277,9 +277,6 @@ xdg_app_builtin_build_bundle (int argc, char **argv, GCancellable *cancellable,
   repofile = g_file_new_for_commandline_arg (location);
   repo = ostree_repo_new (repofile);
 
-  if (!xdg_app_supports_bundles (repo))
-    return xdg_app_fail (error, "Your version of ostree is too old to support single-file bundles");
-
   if (!g_file_query_exists (repofile, cancellable))
     return xdg_app_fail (error, "'%s' is not a valid repository", location);
 

app/xdg-app-builtins-build-import-bundle.c

@@ -96,9 +96,6 @@ xdg_app_builtin_build_import (int argc, char **argv, GCancellable *cancellable,
   repofile = g_file_new_for_commandline_arg (location);
   repo = ostree_repo_new (repofile);
 
-  if (!xdg_app_supports_bundles (repo))
-    return xdg_app_fail (error, "Your version of ostree is too old to support single-file bundles");
-
   if (!g_file_query_exists (repofile, cancellable))
     return xdg_app_fail (error, "'%s' is not a valid repository", location);
 

common/xdg-app-utils.c

@@ -1161,34 +1161,6 @@ xdg_app_connection_track_name_owners (GDBusConnection *connection)
                                       NULL, NULL);
 }
 
-gboolean
-xdg_app_supports_bundles (OstreeRepo *repo)
-{
-  g_autofree char *tmpfile = g_build_filename (g_get_tmp_dir (), ".xdg-app-test-ostree-XXXXXX", NULL);
-  g_autoptr(GFile) file = NULL;
-  g_autoptr(GError) error = NULL;
-  int fd;
-  gboolean res;
-
-  fd = g_mkstemp (tmpfile);
-  if (fd == -1)
-    return FALSE;
-
-  close (fd);
-
-  res = TRUE;
-
-  file = g_file_new_for_path (tmpfile);
-  if (!ostree_repo_static_delta_execute_offline (repo, file, FALSE, NULL, &error))
-    {
-      if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_DIRECTORY))
-        res = FALSE;
-    }
-
-  unlink (tmpfile);
-  return res;
-}
-
 typedef struct
 {
   GError *error;
@@ -2720,9 +2692,6 @@ xdg_app_pull_from_bundle (OstreeRepo *repo,
   g_autoptr(GVariant) metadata = NULL;
   gboolean metadata_valid;
 
-  if (!xdg_app_supports_bundles (repo))
-    return xdg_app_fail (error, "Your version of ostree is too old to support single-file bundles");
-
   metadata = xdg_app_bundle_load (file, &to_checksum, NULL, NULL, NULL, NULL, error);
   if (metadata == NULL)
     return FALSE;

common/xdg-app-utils.h

@@ -94,8 +94,6 @@ gboolean xdg_app_remove_dangling_symlinks (GFile    *dir,
                                            GCancellable  *cancellable,
                                            GError       **error);
 
-gboolean xdg_app_supports_bundles (OstreeRepo *repo);
-
 void  xdg_app_invocation_lookup_app_id        (GDBusMethodInvocation  *invocation,
                                                GCancellable           *cancellable,
                                                GAsyncReadyCallback     callback,