Clean up dead code after spread desugaring

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index 6c2b696a5df1eea3d8d2001e762c28f759d792c7..0ed35cac6c0671ab734374ad81594a2a1e6620c8 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -372,11 +372,7 @@ void AstNumberingVisitor::VisitCompareOperation(CompareOperation* node) {
 }
 
 
-void AstNumberingVisitor::VisitSpread(Spread* node) {
-  IncrementNodeCount();
-  DisableCrankshaft(kSpread);
-  Visit(node->expression());
-}
+void AstNumberingVisitor::VisitSpread(Spread* node) { UNREACHABLE(); }
 
 
 void AstNumberingVisitor::VisitEmptyParentheses(EmptyParentheses* node) {