[Sync] Removing duplicated includes between cc and h files.

components/sync/test/fake_server/fake_server_verifier.cc

Index: components/sync/test/fake_server/fake_server_verifier.cc
diff --git a/components/sync/test/fake_server/fake_server_verifier.cc b/components/sync/test/fake_server/fake_server_verifier.cc
index 48245f06caabe51e75007f769d5b68c4b6bf613c..113656979f6b3111c0e251cc4197a8b922fac24c 100644
--- a/components/sync/test/fake_server/fake_server_verifier.cc
+++ b/components/sync/test/fake_server/fake_server_verifier.cc
@@ -4,19 +4,13 @@
 
 #include "components/sync/test/fake_server/fake_server_verifier.h"
 
-#include <stddef.h>
-
 #include <map>
 #include <memory>
 #include <set>
 #include <vector>
 
 #include "base/json/json_writer.h"
-#include "base/values.h"
-#include "components/sync/base/model_type.h"
 #include "components/sync/test/fake_server/fake_server.h"
-#include "components/sync/test/fake_server/sessions_hierarchy.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 using base::JSONWriter;
 using std::string;