/*D
   MPI_T_event_handle_free - Initiates deallocation of the event-registration handle specified by event_registration

Synopsis:
.vb
int MPI_T_event_handle_free(MPI_T_event_registration event_registration,
                            void *user_data,
                            MPI_T_event_free_cb_function free_cb_function)
.ve

Input Parameters:
+ event_registration - event registration (handle)
. user_data - pointer to a user-controlled buffer (None)
- free_cb_function - pointer to user-defined callback function (function)

.N ThreadSafe

.N Errors
.N MPI_SUCCESS
.N MPI_T_ERR_INVALID_HANDLE
.N MPI_T_ERR_NOT_INITIALIZED
.N MPI_ERR_OTHER

D*/

