Remove comments, no functional change.

Change-Id: I923c037803a847352c2c50d9d47460cb0f01f22c

runtime/hsa-runtime/core/runtime/runtime.cpp

@@ -551,9 +551,6 @@ hsa_status_t Runtime::SetAsyncSignalHandler(hsa_signal_t signal,
                                             hsa_signal_value_t value,
                                             hsa_amd_signal_handler handler,
                                             void* arg) {
-  // Asyncronous signal handler is only supported when KFD events are on.
-  // if (!core::g_use_interrupt_wait) return HSA_STATUS_ERROR_OUT_OF_RESOURCES;
-
   // Indicate that this signal is in use.
   if (signal.handle != 0) hsa_signal_handle(signal)->Retain();