Revert "rocr: Don't assert in hsa_shut_down when no agents (#1115)" (#1312)

This reverts commit fb8ab442b6.

projects/rocr-runtime/runtime/hsa-runtime/core/runtime/runtime.cpp

@@ -2316,12 +2316,12 @@ void Runtime::Unload() {
   mapped_handle_map_.clear();
   memory_handle_map_.clear();
 
+  DestroyAgents();
+
   CloseTools();
 
   AMD::Unload();
 
-  DestroyAgents();
-
   DestroyDrivers();
 
   thunkLoader_->DestroyThunkInstance();