[gtk/mainloop-cleanup: 20/21] Drop gtk_get_main_thread

[Matthias Clasen <matthiasc src gnome org>]

commit a8db322be6e99e4407ecfb05d45ac16725668b96
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Feb 9 22:37:18 2020 -0500

    Drop gtk_get_main_thread
    
    This is not a very useful api, and if you need it,
    you can just as easily keep track yourself which thread
    called gtk_init().

 gtk/gtkmain.c        | 16 ----------------
 gtk/gtkmain.h        |  3 ---
 testsuite/gtk/main.c |  6 ------
 3 files changed, 25 deletions(-)
---
diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index 33fccd8a80..baa486593d 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -142,7 +142,6 @@ static GtkWindowGroup *gtk_main_get_window_group (GtkWidget   *widget);
 static gint pre_initialized = FALSE;
 static gint gtk_initialized = FALSE;
 static GList *current_events = NULL;
-static GThread *initialized_thread = NULL;
 
 typedef struct {
   GdkDisplay *display;
@@ -801,8 +800,6 @@ gtk_init_check (void)
   do_pre_parse_initialization ();
   do_post_parse_initialization ();
 
-  initialized_thread = g_thread_self ();
-
   ret = gdk_display_open_default () != NULL;
 
   if (ret && (gtk_get_debug_flags () & GTK_DEBUG_INTERACTIVE))
@@ -927,19 +924,6 @@ gtk_is_initialized (void)
   return gtk_initialized;
 }
 
-/**
- * gtk_get_main_thread:
- *
- * Get the thread from which GTK was initialized.
- *
- * Returns: (transfer none): The #GThread initialized for GTK, must not be freed
- */
-GThread *
-gtk_get_main_thread (void)
-{
-  return initialized_thread;
-}
-
 
 /**
  * gtk_get_locale_direction:
diff --git a/gtk/gtkmain.h b/gtk/gtkmain.h
index dd5e547953..34bdfb5641 100644
--- a/gtk/gtkmain.h
+++ b/gtk/gtkmain.h
@@ -81,9 +81,6 @@ gboolean gtk_init_check           (void);
 GDK_AVAILABLE_IN_ALL
 gboolean gtk_is_initialized       (void);
 
-GDK_AVAILABLE_IN_ALL
-GThread * gtk_get_main_thread     (void);
-
 #ifdef G_OS_WIN32
 
 /* Variants that are used to check for correct struct packing
diff --git a/testsuite/gtk/main.c b/testsuite/gtk/main.c
index cdfd4d058d..3487d3ed8b 100644
--- a/testsuite/gtk/main.c
+++ b/testsuite/gtk/main.c
@@ -4,15 +4,9 @@
 static void
 test_init (void)
 {
-  GThread *self = g_thread_self ();
-
   g_assert (gtk_is_initialized () == FALSE);
-  g_assert (gtk_get_main_thread () == NULL);
-
   g_assert (gtk_init_check ());
   g_assert (gtk_is_initialized () == TRUE);
-
-  g_assert (gtk_get_main_thread () == self);
 }
 
 int