clang-format: update to latest from docs repo

The openbmc/docs/style/cpp/.clang-format has been updated to support
clang-format10, take this opportunity to update it in this repo.

Change-Id: I9e6b9853bf4cd7399b1ae504ea3be5093d763fee
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/serialize.cpp b/serialize.cpp
index f5aeb11..a6956c2 100644
--- a/serialize.cpp
+++ b/serialize.cpp
@@ -3,11 +3,12 @@
 #include "serialize.hpp"
 
 #include <cereal/archives/json.hpp>
-#include <filesystem>
-#include <fstream>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/server.hpp>
 
+#include <filesystem>
+#include <fstream>
+
 namespace phosphor
 {
 namespace software
@@ -116,8 +117,7 @@
         }
     }
     catch (const std::exception& e)
-    {
-    }
+    {}
 
     return false;
 }