Remove instantiation of MemoryRegion for heap type SVM surfaced by ROCt

Change-Id: Ib4ff7e7cabe9aacb811888aeb74f652dcb57f9e0

runtime/hsa-runtime/core/inc/amd_memory_region.h

@@ -157,10 +157,6 @@ class MemoryRegion : public core::MemoryRegion {
     return mem_props_.HeapType == HSA_HEAPTYPE_GPU_SCRATCH;
   }
 
-  __forceinline bool IsSvm() const {
-    return mem_props_.HeapType == HSA_HEAPTYPE_DEVICE_SVM;
-  }
-
   __forceinline uint32_t BusWidth() const {
     return static_cast<uint32_t>(mem_props_.Width);
   }

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

@@ -296,8 +296,7 @@ void GpuAgent::InitRegionList() {
           memory_bus_width_ = mem_props[mem_idx].Width;
           memory_max_frequency_ = mem_props[mem_idx].MemoryClockMax;
         case HSA_HEAPTYPE_GPU_LDS:
-        case HSA_HEAPTYPE_GPU_SCRATCH:
-        case HSA_HEAPTYPE_DEVICE_SVM: {
+        case HSA_HEAPTYPE_GPU_SCRATCH: {
           MemoryRegion* region =
               new MemoryRegion(false, false, this, mem_props[mem_idx]);