Always deserialize scope infos for parsing

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index 8a84664c18ec44d657ebc85db9208c98d3b66c5f..561a7fce06f8fcf32715040f605681bfd47d3f4b 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -124,13 +124,9 @@ class Scope: public ZoneObject {
 
   // Lookup a variable in this scope. Returns the variable or NULL if not found.
   Variable* LookupLocal(const AstRawString* name) {
-    Variable* result = variables_.Lookup(name);
-    if (result != nullptr || scope_info_.is_null()) return result;
-    return LookupInScopeInfo(name);
+    return variables_.Lookup(name);
   }
 
-  Variable* LookupInScopeInfo(const AstRawString* name);
-
   // Lookup a variable in this scope or outer scopes.
   // Returns the variable or NULL if not found.
   Variable* Lookup(const AstRawString* name);