Fix a weird log function

__FUNCTION__ isn't needed;  It's included in the log macro.

Signed-off-by: Ed Tanous <ed@tanous.net>
Change-Id: Icff2aaf778b494f3e9cfe487cdf538ccef52ffb2
diff --git a/redfish-core/include/utils/fw_utils.hpp b/redfish-core/include/utils/fw_utils.hpp
index 8e04070..0750b43 100644
--- a/redfish-core/include/utils/fw_utils.hpp
+++ b/redfish-core/include/utils/fw_utils.hpp
@@ -406,7 +406,7 @@
                           const std::variant<std::vector<std::string>>& resp) {
             if (ec)
             {
-                BMCWEB_LOG_DEBUG << __FUNCTION__ << " error_code = " << ec
+                BMCWEB_LOG_DEBUG << " error_code = " << ec
                                  << " error msg =  " << ec.message();
                 // System can exist with no updateable firmware,
                 // so don't throw error here.