[tracker] tracker-miner-fs: Remove G_ADD_PRIVATE update leftover

[Carlos Garnacho <carlosg src gnome org>]

commit 07b3e0e402a10199ad654c9f8088ca49a9c91bc6
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Dec 8 12:48:16 2016 +0100

    tracker-miner-fs: Remove G_ADD_PRIVATE update leftover
    
    We still tried to add the same private struct through the old
    means on tracker_writeback_listener_class_init(), which would
    raise a warning.

 src/miners/fs/tracker-writeback-listener.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/miners/fs/tracker-writeback-listener.c b/src/miners/fs/tracker-writeback-listener.c
index 298a005..36ebec6 100644
--- a/src/miners/fs/tracker-writeback-listener.c
+++ b/src/miners/fs/tracker-writeback-listener.c
@@ -107,8 +107,6 @@ tracker_writeback_listener_class_init (TrackerWritebackListenerClass *klass)
                                                              "The FS Miner",
                                                              TRACKER_TYPE_MINER_FILES,
                                                              G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
-
-       g_type_class_add_private (klass, sizeof (TrackerWritebackListenerPrivate));
 }
 
 static void