[turbofan] Introduce Float64Pow and NumberPow operators.

src/interpreter/interpreter-intrinsics.cc

Index: src/interpreter/interpreter-intrinsics.cc
diff --git a/src/interpreter/interpreter-intrinsics.cc b/src/interpreter/interpreter-intrinsics.cc
index 109bf8ec342548a451c3be9e54e6f302076908a1..fc7cfc766d5dcb306bac06b0ef056a56f3f9d181 100644
--- a/src/interpreter/interpreter-intrinsics.cc
+++ b/src/interpreter/interpreter-intrinsics.cc
@@ -238,10 +238,6 @@ Node* IntrinsicsHelper::HasProperty(Node* input, Node* arg_count,
                              CodeFactory::HasProperty(isolate()));
 }
 
-Node* IntrinsicsHelper::MathPow(Node* input, Node* arg_count, Node* context) {
-  return IntrinsicAsStubCall(input, context, CodeFactory::MathPow(isolate()));
-}
-
 Node* IntrinsicsHelper::NewObject(Node* input, Node* arg_count, Node* context) {
   return IntrinsicAsStubCall(input, context,
                              CodeFactory::FastNewObject(isolate()));