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

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 6536ba22a0de1392fc37f709f725f00cd4667145..c65f204dd6f946ed663a1ef2edada257eb166bdb 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -348,12 +348,7 @@ namespace internal {
   F(LiveEditCompareStrings, 2, 1)                   \
   F(LiveEditRestartFrame, 2, 1)
 
-
-#define FOR_EACH_INTRINSIC_MATHS(F) \
-  F(DoubleHi, 1, 1)                 \
-  F(DoubleLo, 1, 1)                 \
-  F(GenerateRandomNumbers, 1, 1)
-
+#define FOR_EACH_INTRINSIC_MATHS(F) F(GenerateRandomNumbers, 1, 1)
 
 #define FOR_EACH_INTRINSIC_NUMBERS(F)  \
   F(NumberToRadixString, 2, 1)         \