[tracker] libtracker-data: Remove TrackerDBManager locking functions

[Carlos Garnacho <carlosg src gnome org>]

commit 648b6603347352e26fed403504667caf2d7fd440
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Nov 5 21:25:09 2016 +0100

    libtracker-data: Remove TrackerDBManager locking functions
    
    The TrackerDBManager mutex is used nowhere now, it's safe to
    remove.

 src/libtracker-data/tracker-db-manager.c |   21 ---------------------
 src/libtracker-data/tracker-db-manager.h |    4 ----
 2 files changed, 0 insertions(+), 25 deletions(-)
---
diff --git a/src/libtracker-data/tracker-db-manager.c b/src/libtracker-data/tracker-db-manager.c
index be0f2d4..30e89cf 100644
--- a/src/libtracker-data/tracker-db-manager.c
+++ b/src/libtracker-data/tracker-db-manager.c
@@ -163,9 +163,6 @@ static guint                 u_cache_size;
 
 static GPrivate              interface_data_key = G_PRIVATE_INIT ((GDestroyNotify)g_object_unref);
 
-/* mutex used by singleton connection in libtracker-direct, not used by tracker-store */
-static GMutex                global_mutex;
-
 static TrackerDBInterface   *global_iface;
 
 /* mutex protecting DB manager initialization/shutdown */
@@ -1772,24 +1769,6 @@ tracker_db_manager_set_need_mtime_check (gboolean needed)
        g_free (filename);
 }
 
-void
-tracker_db_manager_lock (void)
-{
-       g_mutex_lock (&global_mutex);
-}
-
-gboolean
-tracker_db_manager_trylock (void)
-{
-       return g_mutex_trylock (&global_mutex);
-}
-
-void
-tracker_db_manager_unlock (void)
-{
-       g_mutex_unlock (&global_mutex);
-}
-
 inline static gchar *
 get_parser_sha1_filename (void)
 {
diff --git a/src/libtracker-data/tracker-db-manager.h b/src/libtracker-data/tracker-db-manager.h
index de0a48e..86af426 100644
--- a/src/libtracker-data/tracker-db-manager.h
+++ b/src/libtracker-data/tracker-db-manager.h
@@ -72,10 +72,6 @@ gboolean            tracker_db_manager_has_enough_space       (void);
 void                tracker_db_manager_create_version_file    (void);
 void                tracker_db_manager_remove_version_file    (void);
 
-void                tracker_db_manager_lock                   (void);
-gboolean            tracker_db_manager_trylock                (void);
-void                tracker_db_manager_unlock                 (void);
-
 TrackerDBManagerFlags
                     tracker_db_manager_get_flags              (guint *select_cache_size,
                                                                guint *update_cache_size);