Fix non-x64 builds.

runtime/vm/intrinsifier_arm64.cc

Index: runtime/vm/intrinsifier_arm64.cc
diff --git a/runtime/vm/intrinsifier_arm64.cc b/runtime/vm/intrinsifier_arm64.cc
index f12ea8de6931b69e556f1cf97b89e8b0642e2623..fa7c20d0ba5d3e9190f492d1b884ac7c58af6dab 100644
--- a/runtime/vm/intrinsifier_arm64.cc
+++ b/runtime/vm/intrinsifier_arm64.cc
@@ -238,12 +238,6 @@ static int GetScaleFactor(intptr_t size) {
 
 
 #define TYPED_DATA_ALLOCATOR(clazz)                                            \
-void Intrinsifier::TypedData_##clazz##_new(Assembler* assembler) {             \
-  intptr_t size = TypedData::ElementSizeInBytes(kTypedData##clazz##Cid);       \
-  intptr_t max_len = TypedData::MaxElements(kTypedData##clazz##Cid);           \
-  int shift = GetScaleFactor(size);                                            \
-  TYPED_ARRAY_ALLOCATION(TypedData, kTypedData##clazz##Cid, max_len, shift);   \
-}                                                                              \
 void Intrinsifier::TypedData_##clazz##_factory(Assembler* assembler) {         \
   intptr_t size = TypedData::ElementSizeInBytes(kTypedData##clazz##Cid);       \
   intptr_t max_len = TypedData::MaxElements(kTypedData##clazz##Cid);           \