media: dmx.h: get rid of GET_DMX_EVENT

This seems to be a pure fictional API :-)

It only exists at the DVB book, with no code implemeting it.

So, just get rid of it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/dvb/dmx-get-event.rst

-.. -*- coding: utf-8; mode: rst -*-
-
-.. _DMX_GET_EVENT:
-
-=============
-DMX_GET_EVENT
-=============
-
-Name
-----
-
-DMX_GET_EVENT
-
-
-Synopsis
---------
-
-.. c:function:: int ioctl( int fd, DMX_GET_EVENT, struct dmx_event *ev)
-    :name: DMX_GET_EVENT
-
-
-Arguments
----------
-
-``fd``
-    File descriptor returned by :c:func:`open() <dvb-dmx-open>`.
-
-``ev``
-    Pointer to the location where the event is to be stored.
-
-
-Description
------------
-
-This ioctl call returns an event if available. If an event is not
-available, the behavior depends on whether the device is in blocking or
-non-blocking mode. In the latter case, the call fails immediately with
-errno set to ``EWOULDBLOCK``. In the former case, the call blocks until an
-event becomes available.
-
-
-Return Value
-------------
-
-On success 0 is returned, on error -1 and the ``errno`` variable is set
-appropriately. The generic error codes are described at the
-:ref:`Generic Error Codes <gen-errors>` chapter.
-
-
-
-.. flat-table::
-    :header-rows:  0
-    :stub-columns: 0
-
-
-    -  .. row 1
-
-       -  ``EWOULDBLOCK``
-
-       -  There is no event pending, and the device is in non-blocking mode.

Documentation/media/uapi/dvb/dmx_fcalls.rst

@@ -18,7 +18,6 @@ Demux Function Calls
     dmx-set-filter
     dmx-set-pes-filter
     dmx-set-buffer-size
-    dmx-get-event
     dmx-get-stc
     dmx-get-pes-pids
     dmx-add-pid

Documentation/media/uapi/dvb/dmx_types.rst

@@ -166,25 +166,6 @@ struct dmx_pes_filter_params
 	__u32          flags;
     };
 
-
-struct dmx_event
-================
-
-.. c:type:: dmx_event
-
-.. code-block:: c
-
-     struct dmx_event
-     {
-	 dmx_event_t          event;
-	 time_t               timeStamp;
-	 union
-	 {
-	     dmx_scrambling_status_t scrambling;
-	 } u;
-     };
-
-
 struct dmx_stc
 ==============