Remove g_type_init() calls

Very many testcases, some GLib tools (resource compiler, etc) and
GApplication were calling g_type_init().

Remove those uses, as they are no longer required.

https://bugzilla.gnome.org/show_bug.cgi?id=686161

gio/gdbusaddress.c

@@ -1333,8 +1333,6 @@ g_win32_run_session_bus (HWND hwnd, HINSTANCE hinst, char *cmdline, int nCmdShow
   if (g_getenv ("GDBUS_DAEMON_DEBUG") != NULL)
     open_console_window ();
 
-  g_type_init ();
-
   loop = g_main_loop_new (NULL, FALSE);
 
   address = "nonce-tcp:";