Removed some useless/dead code regarding CompileTimeValues.

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index e53c4642910f3ea9a9fb3ed9f638df839ab7d417..7732a1d400ede5dab19ef759e0bc202223b3d830 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -1806,10 +1806,7 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
     Expression* subexpr = subexprs->at(i);
     // If the subexpression is a literal or a simple materialized literal it
     // is already set in the cloned array.
-    if (subexpr->AsLiteral() != NULL ||
-        CompileTimeValue::IsCompileTimeValue(subexpr)) {
-      continue;
-    }
+    if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue;
 
     if (!result_saved) {
       __ push(rax);  // array literal