Remove Unnecessary Include Headers

- This commit removes the headers that are not required
  for the lock_test.cpp to compile.
- Resolves #161

Tested By:
- Was able to get a clean compilation & unittests passed.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Ie9ceea4c0fcea0a2ce4356c48b1a75fdab1f51f5
diff --git a/redfish-core/ut/lock_test.cpp b/redfish-core/ut/lock_test.cpp
index ae639ea..bdb0dd6 100644
--- a/redfish-core/ut/lock_test.cpp
+++ b/redfish-core/ut/lock_test.cpp
@@ -1,7 +1,4 @@
 #include "ibm/locks.hpp"
-#include "nlohmann/json.hpp"
-
-#include <utils/json_utils.hpp>
 
 #include <string>