Fix cppcheck warnings

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: Ibe6b12e81292c655f0ab1420159521c2e6991e37
diff --git a/command/rakp12.cpp b/command/rakp12.cpp
index bec5c4f..a68cdcb 100644
--- a/command/rakp12.cpp
+++ b/command/rakp12.cpp
@@ -39,7 +39,7 @@
                                  messageArgs.value().c_str()));
 }
 std::vector<uint8_t> RAKP12(const std::vector<uint8_t>& inPayload,
-                            std::shared_ptr<message::Handler>& handler)
+                            std::shared_ptr<message::Handler>& /* handler */)
 {
     auto request = reinterpret_cast<const RAKP1request*>(inPayload.data());
     // verify inPayload minimum size