Temporary workaround to make VM bots greener.

runtime/bin/isolate_data.h

Index: runtime/bin/isolate_data.h
diff --git a/runtime/bin/isolate_data.h b/runtime/bin/isolate_data.h
index 49a993fc53e3f8c197ed132d11f59b5c59ee3dc0..29d2884714b6557eae579934634b4bbc7ce83ed6 100644
--- a/runtime/bin/isolate_data.h
+++ b/runtime/bin/isolate_data.h
@@ -36,12 +36,14 @@ class IsolateData {
       this->packages_file = strdup(packages_file);
     }
   }
+#if 0
   ~IsolateData() {
     free(script_url);
     free(package_root);
     free(packages_file);
     free(udp_receive_buffer);
   }
+#endif
 
   char* script_url;
   char* package_root;