X87: enable snapshot

src/x87/lithium-x87.h

Index: src/x87/lithium-x87.h
diff --git a/src/x87/lithium-x87.h b/src/x87/lithium-x87.h
index 18c62defaba0905c2cb3541a69d2982430317918..e54ba023f83ce5ee0bfacee05466f7af2d4457be 100644
--- a/src/x87/lithium-x87.h
+++ b/src/x87/lithium-x87.h
@@ -1336,12 +1336,6 @@ class LConstantS FINAL : public LTemplateInstruction<1, 0, 0> {
 
 class LConstantD FINAL : public LTemplateInstruction<1, 0, 1> {
  public:
-  explicit LConstantD(LOperand* temp) {
-    temps_[0] = temp;
-  }
-
-  LOperand* temp() { return temps_[0]; }
-
   DECLARE_CONCRETE_INSTRUCTION(ConstantD, "constant-d")
   DECLARE_HYDROGEN_ACCESSOR(Constant)