Revert "opal/accelerator: add stream_wait_event API"

This reverts commit 673b5f0.

Author: wenduwan

opal/mca/accelerator/accelerator.h

@@ -185,17 +185,6 @@ typedef int (*opal_accelerator_base_module_destroy_stream_fn_t)(
 typedef int (*opal_accelerator_base_module_synchronize_stream_fn_t)(
     opal_accelerator_stream_t *stream);
 
-/**
- * Make a stream wait on an event
- *
- * @param[IN] stream         Stream to wait
- * @param[IN] event          Event to wait on
- *
- * @return                   OPAL_SUCCESS or error status on failure
- */
-typedef int (*opal_accelerator_base_module_stream_wait_event_fn_t)(
-    opal_accelerator_stream_t *stream, opal_accelerator_event_t *event);
-
 /**
  * Creates an event. An event is a synchronization marker that can be
  * appended to a stream to monitor device progress or synchronize the
@@ -439,7 +428,6 @@ typedef struct {
     opal_accelerator_base_module_create_stream_fn_t create_stream;
     opal_accelerator_base_module_destroy_stream_fn_t destroy_stream;
     opal_accelerator_base_module_synchronize_stream_fn_t synchronize_stream;
-    opal_accelerator_base_module_stream_wait_event_fn_t stream_wait_event;
     opal_accelerator_base_module_create_event_fn_t create_event;
     opal_accelerator_base_module_record_event_fn_t record_event;
     opal_accelerator_base_module_query_event_fn_t query_event;