[parser] Remove obsolete ParseInfo::is_global flag.

src/background-parsing-task.cc

Index: src/background-parsing-task.cc
diff --git a/src/background-parsing-task.cc b/src/background-parsing-task.cc
index 83075c1eec3d469daea991143ef73db7add8c396..f316d8c952512212ff440d4ad20acaf987287667 100644
--- a/src/background-parsing-task.cc
+++ b/src/background-parsing-task.cc
@@ -37,7 +37,6 @@ BackgroundParsingTask::BackgroundParsingTask(
   info->set_source_stream(source->source_stream.get());
   info->set_source_stream_encoding(source->encoding);
   info->set_hash_seed(isolate->heap()->HashSeed());
-  info->set_global();
   info->set_unicode_cache(&source_->unicode_cache);
   info->set_compile_options(options);
   // Parse eagerly with ignition since we will compile eagerly.