Remove --harmony-scoping flag.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 14046b410d476ecf2173e928a960a51068901317..156029cffb95b56a74edc110c24d049dfa4e3e1a 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5318,7 +5318,8 @@ void HOptimizedGraphBuilder::VisitVariableProxy(VariableProxy* expr) {
 
       Handle<GlobalObject> global(current_info()->global_object());
 
-      if (FLAG_harmony_scoping) {
+      // Lookup in script contexts.
+      {
         Handle<ScriptContextTable> script_contexts(
             global->native_context()->script_context_table());
         ScriptContextTable::LookupResult lookup;
@@ -6478,7 +6479,8 @@ void HOptimizedGraphBuilder::HandleGlobalVariableAssignment(
     BailoutId ast_id) {
   Handle<GlobalObject> global(current_info()->global_object());
 
-  if (FLAG_harmony_scoping) {
+  // Lookup in script contexts.
+  {
     Handle<ScriptContextTable> script_contexts(
         global->native_context()->script_context_table());
     ScriptContextTable::LookupResult lookup;