clang-tidy:test fix file not found error

This commit resolves the clang-diagnostic-error related to the
missing 'sample.h' file.

Change-Id: I2cd7afe57362eba18f2d2a08c09947c8118e2a74
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>
diff --git a/test/oemrouter_unittest.cpp b/test/oemrouter_unittest.cpp
index f5997fd..7016c6e 100644
--- a/test/oemrouter_unittest.cpp
+++ b/test/oemrouter_unittest.cpp
@@ -1,5 +1,3 @@
-#include "sample.h"
-
 #include <ipmid/api.h>
 
 #include <ipmid/oemrouter.hpp>