Clean up serialization of RawFunction, RawCode

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 1fdb20c02d1e36897a9f060e774c5aedb157e024..925f56d4abf1f6a051d128f1a7ee14beb3a5e02e 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -773,9 +773,6 @@ class RawFunction : public RawObject {
     return reinterpret_cast<RawObject**>(&ptr()->data_);
   }
   RawArray* ic_data_array_;  // ICData of unoptimized code.
-  RawObject** to_optimized_snapshot() {
-    return reinterpret_cast<RawObject**>(&ptr()->ic_data_array_);
-  }
   RawObject** to_no_code() {
     return reinterpret_cast<RawObject**>(&ptr()->ic_data_array_);
   }