Clean up dead code after spread desugaring

src/ast/ast-numbering.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast/ast-numbering.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 
 namespace v8 {
@@ skipping 354 matching lines @@
 
 
 void AstNumberingVisitor::VisitCompareOperation(CompareOperation* node) {
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(CompareOperation::num_ids()));
   Visit(node->left());
   Visit(node->right());
 }
 
 
-void AstNumberingVisitor::VisitSpread(Spread* node) {
-  IncrementNodeCount();
-  DisableCrankshaft(kSpread);
-  Visit(node->expression());
-}
+void AstNumberingVisitor::VisitSpread(Spread* node) { UNREACHABLE(); }
 
 
 void AstNumberingVisitor::VisitEmptyParentheses(EmptyParentheses* node) {
   UNREACHABLE();
 }
 
 
 void AstNumberingVisitor::VisitForInStatement(ForInStatement* node) {
   IncrementNodeCount();
   DisableSelfOptimization();
@@ skipping 208 matching lines @@
 }
 
 
 bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
                             FunctionLiteral* function) {
   AstNumberingVisitor visitor(isolate, zone);
   return visitor.Renumber(function);
 }
 }  // namespace internal
 }  // namespace v8