treewide: Cleanup pedantic C++ warnings

Change-Id: I9c770506d78bd30dde1903645d9bfe92bceab44d
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/ipmi.cpp b/ipmi.cpp
index bcd2b4d..64617aa 100644
--- a/ipmi.cpp
+++ b/ipmi.cpp
@@ -38,7 +38,7 @@
 namespace ipmi
 {
 
-ipmi_ret_t handleSysCommand(HandlerInterface* handler, ipmi_cmd_t cmd,
+ipmi_ret_t handleSysCommand(HandlerInterface* handler, ipmi_cmd_t,
                             const uint8_t* reqBuf, uint8_t* replyCmdBuf,
                             size_t* dataLen)
 {