Remove USE_AV_COPY, USE_PEER_TO_PEER fallback paths.

Change-Id: I9c20173e62029c4caebabc98784c6d7697758e4f


[ROCm/clr commit: 60f797cc5a]

projects/clr/hipamd/src/hip_stream.cpp

@@ -74,12 +74,6 @@ hipError_t hipStreamCreate(hipStream_t *stream)
 }
 
 
-#if USE_AV_COPY==0
-//---
-/**
- * @bug This function conservatively waits for all work in the specified stream to complete.
- */
-#endif
 hipError_t hipStreamWaitEvent(hipStream_t stream, hipEvent_t event, unsigned int flags)
 {
     HIP_INIT_API(stream, event, flags);
@@ -93,14 +87,11 @@ hipError_t hipStreamWaitEvent(hipStream_t stream, hipEvent_t event, unsigned int
 
         bool fastWait = false;
 
-#if USE_AV_COPY
         if (stream != hipStreamNull) {
             stream->locked_waitEvent(event);
 
             fastWait = true; // don't use the slow host-side synchronization.
         }
-        // TODO - clean up if/else logic when USE_AV_COPY enabled.
-#endif
 
         if (!fastWait) {
             // TODO-hcc Convert to use create_blocking_marker(...) functionality.