Remove unstructured annotation cpp.type in carbon thrift codegen

Summary: Remove unstructured annotation in carbon thrift codegen.

Reviewed By: iahs

Differential Revision: D74517847

fbshipit-source-id: 5b84dd83c24fe9dc8bea436c455c80ad05b5fce2

Author: thedavekwon

mcrouter/lib/carbon/test/gen/CarbonThriftTest.thrift

@@ -23,11 +23,16 @@ cpp_include "<mcrouter/lib/carbon/test/Timestamp.h>"
 
 namespace cpp2 carbon.test.thrift
 namespace py3 carbon.test.thrift
+
+
 @cpp.Adapter{name = "carbon::test::TimestampAdapter"}
 typedef i64 CustomAdapterTypeI64
 
+@cpp.Type{name = "::folly::IOBuf"}
+typedef binary CustomAdapterTypeBinaryInner
+
 @cpp.Adapter{name = "::carbon::test::DummyPairAdapter<::carbon::test::Timestamp,uint32_t>"}
-typedef binary (cpp.type = "::folly::IOBuf") CustomAdapterTypeBinary
+typedef CustomAdapterTypeBinaryInner CustomAdapterTypeBinary
 
 
 enum MyEnum {