[intrinsics] Drop the now obsolete %_DoubleHi and %_DoubleLo intrinsics.

src/crankshaft/arm/lithium-arm.h

Index: src/crankshaft/arm/lithium-arm.h
diff --git a/src/crankshaft/arm/lithium-arm.h b/src/crankshaft/arm/lithium-arm.h
index 4aa4a71702a9a08c6afc0b52e6f99011bb81f92c..8db5c0215d11b0621530142622ed8746300b97ba 100644
--- a/src/crankshaft/arm/lithium-arm.h
+++ b/src/crankshaft/arm/lithium-arm.h
@@ -60,7 +60,6 @@ class LCodeGen;
   V(DivByConstI)                             \
   V(DivByPowerOf2I)                          \
   V(DivI)                                    \
-  V(DoubleBits)                              \
   V(DoubleToI)                               \
   V(DoubleToSmi)                             \
   V(Drop)                                    \
@@ -2328,19 +2327,6 @@ class LClampTToUint8 final : public LTemplateInstruction<1, 1, 1> {
 };
 
 
-class LDoubleBits final : public LTemplateInstruction<1, 1, 0> {
- public:
-  explicit LDoubleBits(LOperand* value) {
-    inputs_[0] = value;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(DoubleBits, "double-bits")
-  DECLARE_HYDROGEN_ACCESSOR(DoubleBits)
-};
-
-
 class LAllocate final : public LTemplateInstruction<1, 2, 2> {
  public:
   LAllocate(LOperand* context,