clean header file include

Change-Id: I5df52db13f964a92bba7cc8659ec6bcc222f5cbb
diff --git a/src/protocol-detail/revoke.cpp b/src/protocol-detail/revoke.cpp
index f8e3142..0123b3f 100644
--- a/src/protocol-detail/revoke.cpp
+++ b/src/protocol-detail/revoke.cpp
@@ -53,7 +53,7 @@
 
 Block
 REVOKE::encodeDataContent(const std::string& ecdhKey, const std::string& salt,
-                             const CertificateRequest& request,
+                             const RequestState& request,
                              const std::list<std::string>& challenges)
 {
   Block response = makeEmptyBlock(tlv::Content);