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

components/sync/test/fake_server/unique_client_entity.cc

Index: components/sync/test/fake_server/unique_client_entity.cc
diff --git a/components/sync/test/fake_server/unique_client_entity.cc b/components/sync/test/fake_server/unique_client_entity.cc
index 62af22a541dc135c1e055e3b71c0a0a0036bb35f..8a450928b71351b008edf929583a34026b76409b 100644
--- a/components/sync/test/fake_server/unique_client_entity.cc
+++ b/components/sync/test/fake_server/unique_client_entity.cc
@@ -4,16 +4,9 @@
 
 #include "components/sync/test/fake_server/unique_client_entity.h"
 
-#include <stdint.h>
-
-#include <memory>
-#include <string>
-
 #include "base/guid.h"
-#include "components/sync/base/model_type.h"
 #include "components/sync/protocol/sync.pb.h"
 #include "components/sync/syncable/syncable_util.h"
-#include "components/sync/test/fake_server/fake_server_entity.h"
 #include "components/sync/test/fake_server/permanent_entity.h"
 
 using std::string;