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

src/crankshaft/s390/lithium-s390.h

Index: src/crankshaft/s390/lithium-s390.h
diff --git a/src/crankshaft/s390/lithium-s390.h b/src/crankshaft/s390/lithium-s390.h
index 283629faa025dd8c340e5e5ef54ac9a41afaaea0..54339e3410ab1321d683e632c3995553d2bf0331 100644
--- a/src/crankshaft/s390/lithium-s390.h
+++ b/src/crankshaft/s390/lithium-s390.h
@@ -60,7 +60,6 @@ class LCodeGen;
   V(DivByConstI)                             \
   V(DivByPowerOf2I)                          \
   V(DivI)                                    \
-  V(DoubleBits)                              \
   V(DoubleToI)                               \
   V(DoubleToSmi)                             \
   V(Drop)                                    \
@@ -2114,16 +2113,6 @@ class LClampTToUint8 final : public LTemplateInstruction<1, 1, 1> {
   DECLARE_CONCRETE_INSTRUCTION(ClampTToUint8, "clamp-t-to-uint8")
 };
 
-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, LOperand* size, LOperand* temp1,