remove #include in test_HOM

debug/test_HOM.cc

-#include <cstdlib>
-#include <cstdio>
-#include <string>
 #include <iostream>
-#include <functional>
 #include <cctype>
 #include <locale>
 #include <unistd.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <parser/sql_utils.hh>
 #include "util/onions.hh"
 #include <crypto/prng.hh>
 #include <crypto/BasicCrypto.hh>
 #include <crypto/paillier.hh>
-#include <parser/sql_utils.hh>
 #include <crypto/SWPSearch.hh>
 #include <crypto/BasicCrypto.hh>
 #include <crypto/arc4.hh>