- Remove the legacy debug protocol.

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index 8935ed07d622b6d503e38f180a47129b2d897a84..eb12276a9200dcdf0880351385ca6931ea558e9a 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -73,8 +73,6 @@ class ReadOnlyHandles {
 const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
                            const uint8_t* instructions_snapshot,
                            Dart_IsolateCreateCallback create,
-                           Dart_IsolateInterruptCallback interrupt,
-                           Dart_IsolateUnhandledExceptionCallback unhandled,
                            Dart_IsolateShutdownCallback shutdown,
                            Dart_FileOpenCallback file_open,
                            Dart_FileReadCallback file_read,
@@ -197,8 +195,6 @@ const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
 
   Thread::ExitIsolate();  // Unregister the VM isolate from this thread.
   Isolate::SetCreateCallback(create);
-  Isolate::SetInterruptCallback(interrupt);
-  Isolate::SetUnhandledExceptionCallback(unhandled);
   Isolate::SetShutdownCallback(shutdown);
 
   Service::SetGetServiceAssetsCallback(get_service_assets);