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

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 9891ab5fda98d6267295bfb5bf9947dbf133000f..dffc546573e84969c76c2c5e3bbfba5df0c46666 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1439,9 +1439,6 @@ Type* Typer::Visitor::TypeJSCallRuntime(Node* node) {
     case Runtime::kInlineIsTypedArray:
     case Runtime::kInlineIsRegExp:
       return Type::Boolean();
-    case Runtime::kInlineDoubleLo:
-    case Runtime::kInlineDoubleHi:
-      return Type::Signed32();
     case Runtime::kInlineCreateIterResultObject:
     case Runtime::kInlineRegExpConstructResult:
       return Type::OtherObject();