Added to remove MAC CI Warnings (#726)

Co-authored-by: TejalKhade28 <tejal.khade@intel.com>
Co-authored-by: Ankit Maheshkar <ankit.maheshkar@intel.com>

Author: 3 people

onnxruntime/test/perftest/performance_runner.cc

@@ -218,6 +218,7 @@ Status PerformanceRunner::RunParallelDuration() {
 
   // Join
   tpool->Schedule([this, &counter, &m, &cv]() {
+    ORT_UNUSED_PARAMETER(this);
     std::unique_lock<std::mutex> lock(m);
     cv.wait(lock, [&counter]() { return counter == 0; });
   });