Revert "Track the 'awaiter return' call stack..."

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
diff --git a/runtime/vm/flow_graph_compiler.cc b/runtime/vm/flow_graph_compiler.cc
index 50e080967ae4efd51dffcaeda5556b5f5aee60c9..0c9c743b58bae3aaa513b3a73ef1c8d8a376e5e4 100644
--- a/runtime/vm/flow_graph_compiler.cc
+++ b/runtime/vm/flow_graph_compiler.cc
@@ -671,13 +671,10 @@ void FlowGraphCompiler::GenerateDeferredCode() {
 void FlowGraphCompiler::AddExceptionHandler(intptr_t try_index,
                                             intptr_t outer_try_index,
                                             intptr_t pc_offset,
-                                            TokenPosition token_pos,
-                                            bool is_generated,
                                             const Array& handler_types,
                                             bool needs_stacktrace) {
   exception_handlers_list_->AddHandler(try_index, outer_try_index, pc_offset,
-                                       token_pos, is_generated, handler_types,
-                                       needs_stacktrace);
+                                       handler_types, needs_stacktrace);
 }