fix compiler warnings

Fix a couple unused-parameter warnings so we can turn the warnings all
the way up.

Change-Id: I36c611da5a10732dbb89e289e42a870c902dd245
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/msl_verify_main.cpp b/msl_verify_main.cpp
index 1810632..1a43faf 100644
--- a/msl_verify_main.cpp
+++ b/msl_verify_main.cpp
@@ -6,7 +6,7 @@
 #include <phosphor-logging/elog.hpp>
 #include <xyz/openbmc_project/Software/Version/error.hpp>
 
-int main(int argc, char* argv[])
+int main(int, char*[])
 {
     using MinimumShipLevel = openpower::software::image::MinimumShipLevel;
     MinimumShipLevel minimumShipLevel(PNOR_MSL);