main.c: Deprecate gdm transition signal

plymouth used to create a file in /var to tell gdm to start in active vt,
but gdm don't use this file now. and create file in filesystem too early
will cause race problem when /var is a seperate partition or it's on an
lvm volume.

configure.ac

@@ -112,10 +112,6 @@ fi
 
 AC_ARG_ENABLE(gdm-transition, AS_HELP_STRING([--enable-gdm-transition],[enable smooth transition to gdm]),enable_gdm_transition=$enableval,enable_gdm_transition=no)
 
-if test x$enable_gdm_transition = xyes; then
-  AC_DEFINE(PLY_ENABLE_DEPRECATED_GDM_TRANSITION, 1, [Enable deprecated smooth transition to GDM])
-fi
-
 AC_ARG_ENABLE(upstart-monitoring, AS_HELP_STRING([--enable-upstart-monitoring],[listen for messages on the Upstart D-Bus interface]),enable_upstart_monitoring=$enableval,enable_upstart_monitoring=no)
 if test x$enable_upstart_monitoring = xyes; then
   PKG_CHECK_MODULES(DBUS, [dbus-1])

src/main.c

@@ -1166,17 +1166,6 @@ on_hide_splash (state_t *state)
         dump_details_and_quit_splash (state);
 }
 
-#ifdef PLY_ENABLE_DEPRECATED_GDM_TRANSITION
-static void
-tell_gdm_to_transition (void)
-{
-        int fd;
-
-        fd = creat ("/var/spool/gdm/force-display-on-active-vt", 0644);
-        close (fd);
-}
-#endif
-
 static void
 quit_program (state_t *state)
 {
@@ -1192,13 +1181,6 @@ quit_program (state_t *state)
                 pid_file = NULL;
         }
 
-#ifdef PLY_ENABLE_DEPRECATED_GDM_TRANSITION
-        if (state->should_retain_splash &&
-            state->mode == PLY_BOOT_SPLASH_MODE_BOOT_UP)
-                tell_gdm_to_transition ();
-
-#endif
-
         if (state->deactivate_trigger != NULL) {
                 ply_trigger_pull (state->deactivate_trigger, NULL);
                 state->deactivate_trigger = NULL;