remove accelerator_view::get_hsa_queue()

This function returns the underlying hsa_queue_t for an
accelerator_view, but this mapping is not stable in the presence of
queue stealing. It was introduced for HIP, but it is not used
anywhere, and it is unsafe anyway.

include/hc.hpp

@@ -492,16 +492,6 @@ class accelerator_view {
         return pQueue->isEmpty();
     }
 
-    /**
-     * Returns an opaque handle which points to the underlying HSA queue.
-     *
-     * @return An opaque handle of the underlying HSA queue, if the accelerator
-     *         view is based on HSA.  NULL if otherwise.
-     */
-    void* get_hsa_queue() {
-        return pQueue->getHSAQueue();
-    }
-
     /**
      * Returns an opaque handle which points to the underlying HSA agent.
      *

include/kalmar_runtime.h

@@ -256,9 +256,6 @@ class KalmarQueue
   /// Is the queue empty?  Same as getPendingAsyncOps but may be faster.
   virtual bool isEmpty() { return 0; }
 
-  /// get underlying native queue handle
-  virtual void* getHSAQueue() { return nullptr; }
-
   /// get underlying native agent handle
   virtual void* getHSAAgent() { return nullptr; }
 

lib/hsa/mcwamp_hsa.cpp

@@ -1972,10 +1972,6 @@ class HSAQueue final : public KalmarQueue
         }
     }
 
-    void* getHSAQueue() override {
-        return static_cast<void*>(rocrQueue->_hwQueue);
-    }
-
     hsa_queue_t *acquireLockedRocrQueue();
 
     void releaseLockedRocrQueue();