wsl/libhsakmt: remove redundant #include "libhsakmt.h"

move libhsakmt.h inclusion to he makefile

Signed-off-by: Flora Cui <flora.cui@amd.com>
Reviewed-by: Tianci Yin <tianci.yin@amd.com>
Part-of: <http://10.67.69.192/wsl/rocr-runtime/-/merge_requests/95>

events.cpp

@@ -27,7 +27,6 @@
 #include <cassert>
 #include <thread>
 #include <chrono>
-#include "libhsakmt.h"
 
 HSAKMT_STATUS HSAKMTAPI hsaKmtCreateEvent(HsaEventDescriptor *EventDesc,
                                           bool ManualReset, bool IsSignaled,