[PATCH] bsp-howto: Mention clock driver hook removal

[Sebastian Huber]

Update #3436.
---
 bsp-howto/clock.rst | 23 +----------------------
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/bsp-howto/clock.rst b/bsp-howto/clock.rst
index 4a853a4..326ad6c 100644
--- a/bsp-howto/clock.rst
+++ b/bsp-howto/clock.rst
@@ -271,28 +271,7 @@ The hardware-specific support at tick is specified by
 System Shutdown Support
 =======================
 
-Optionally, the :dfn:`Clock Driver Shell` provides the routine ``Clock_exit()``
-that is scheduled to be run during system shutdown via the ``atexit()``
-routine.  The hardware-specific shutdown support is specified by
-``Clock_driver_support_shutdown_hardware()`` which is used by ``Clock_exit()``.
-It should disable the clock tick source if it was enabled.  This can be used to
-prevent clock ticks after the system is shutdown.  The
-``Clock_driver_support_shutdown_hardware()`` must be provided as a macro.  In
-case this macro is undefined, then the shutdown support is disabled.  This is
-useful for example on memory constrained systems to avoid the ``atexit()``
-overhead.
-
-.. code-block:: c
-
-    static void some_support_shutdown_hardware( void )
-    {
-      /* Shutdown hardware */
-    }
-
-    #define Clock_driver_support_shutdown_hardware() \
-      some_support_shutdown_hardware()
-
-    #include "../../../shared/dev/clock/clockimpl.h"
+The clock driver system shutdown support was removed in RTEMS 5.1.
 
 SMP Support
 ===========
-- 
2.13.7