Remove assert for physical vs virtual memory size

On systems with more than 1 TB of memory per NUMA region, this triggers
unnecessary errors.

Change-Id: I1bc7f209b9c1739b516c9f6b0acf434488ac7b8d

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

@@ -164,7 +164,6 @@ MemoryRegion::MemoryRegion(bool fine_grain, bool kernarg, bool full_profile,
   }
 
   assert(GetVirtualSize() != 0);
-  assert(GetPhysicalSize() <= GetVirtualSize());
   assert(IsMultipleOf(max_single_alloc_size_, kPageSize_));
 }