remove useless code

Author: NikolasK-source

test/test.cpp

@@ -5,10 +5,8 @@
 
 #include "cxxitimer.hpp"
 
-#include <csignal>
-#include <cstring>
 #include <iostream>
-#include <sysexits.h>
+#include <signal.h>
 #include <thread>
 
 static int  x = 0;
@@ -18,21 +16,13 @@ static void handler(int) {
 
 int main() {
     struct sigaction sa {};
-    memset(&sa, 0, sizeof(sa));
     sa.sa_handler = handler;
     int tmp       = sigaction(SIGALRM, &sa, nullptr);
     if (tmp != 0) {
         perror("sigaction");
         return EXIT_FAILURE;
     }
 
-    sigset_t set;
-    sigemptyset(&set);
-    if (sigaddset(&set, SIGALRM) == -1) {
-        perror("sigaddset");
-        return EX_OSERR;
-    }
-
     cxxitimer::ITimer_Real timer(2.0, 1.0);
 
     timer.start();