Remove the optimized construct stub.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 8a3ae92906625ee45f19a6838b9e303752961f81..ed9ee10446b0228afba45bddededac1f6979098a 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -501,20 +501,6 @@ class Parser BASE_EMBEDDED {
     int NextHandlerIndex() { return next_handler_index_++; }
     int handler_count() { return next_handler_index_; }
 
-    void SetThisPropertyAssignmentInfo(
-        bool only_simple_this_property_assignments,
-        Handle<FixedArray> this_property_assignments) {
-      only_simple_this_property_assignments_ =
-          only_simple_this_property_assignments;
-      this_property_assignments_ = this_property_assignments;
-    }
-    bool only_simple_this_property_assignments() {
-      return only_simple_this_property_assignments_;
-    }
-    Handle<FixedArray> this_property_assignments() {
-      return this_property_assignments_;
-    }
-
     void AddProperty() { expected_property_count_++; }
     int expected_property_count() { return expected_property_count_; }
 
@@ -544,11 +530,6 @@ class Parser BASE_EMBEDDED {
     // Properties count estimation.
     int expected_property_count_;
 
-    // Keeps track of assignments to properties of this. Used for
-    // optimizing constructors.
-    bool only_simple_this_property_assignments_;
-    Handle<FixedArray> this_property_assignments_;
-
     // For generators, the variable that holds the generator object.  This
     // variable is used by yield expressions and return statements.  NULL
     // indicates that this function is not a generator.