Drop UniqueId from include/v8.h

test/cctest/test-api-interceptors.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 
 #include "test/cctest/test-api.h"
 
 #include "include/v8-util.h"
 #include "src/api.h"
@@ skipping 20 matching lines @@
 using ::v8::MessageCallback;
 using ::v8::Object;
 using ::v8::ObjectTemplate;
 using ::v8::Persistent;
 using ::v8::Script;
 using ::v8::StackTrace;
 using ::v8::String;
 using ::v8::Symbol;
 using ::v8::TryCatch;
 using ::v8::Undefined;
-using ::v8::UniqueId;
 using ::v8::V8;
 using ::v8::Value;
 
 
 namespace {
 
 void Returns42(const v8::FunctionCallbackInfo<v8::Value>& info) {
   info.GetReturnValue().Set(42);
 }
 
@@ skipping 4963 matching lines @@
             ->Set(env.local(), v8_str("Fun"),
                   fun_templ->GetFunction(env.local()).ToLocalChecked())
             .FromJust());
 
   CompileRun(
       "var f = new Fun();"
       "Number.prototype.__proto__ = f;"
       "var a = 42;"
       "for (var i = 0; i<3; i++) { a.foo; }");
 }