Remove redundant header files

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I27c4d20ce540438d5ed8d2aed309d31eef56cbdf
diff --git a/chassiskill.cpp b/chassiskill.cpp
index ba694c9..a209230 100644
--- a/chassiskill.cpp
+++ b/chassiskill.cpp
@@ -4,8 +4,6 @@
 #include <phosphor-logging/log.hpp>
 
 #include <algorithm>
-#include <cstring>
-#include <experimental/filesystem>
 #include <fstream>
 
 using json = nlohmann::json;