clang-format: update to latest from docs repo

This is from openbmc/docs/style/cpp/.clang-format

Other OpenBMC repos are doing the same.

Tested: Built and validator passed.
Change-Id: Ief26c755c9ce012823e16a506342b0547a53517a
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/include/async_resp.hpp b/include/async_resp.hpp
index 78994cf..f596dcd 100644
--- a/include/async_resp.hpp
+++ b/include/async_resp.hpp
@@ -14,13 +14,11 @@
 {
   public:
     AsyncResp(crow::Response& response) : res(response)
-    {
-    }
+    {}
 
     AsyncResp(crow::Response& response, std::function<void()>&& function) :
         res(response), func(std::move(function))
-    {
-    }
+    {}
 
     ~AsyncResp()
     {