Removed double inclusion of thread in example

FreddyFunk · FreddyFunk · commit a63d8610ae90 · 2018-09-26T18:27:50.000+02:00
diff --git a/example/example.cpp b/example/example.cpp
@@ -1,6 +1,5 @@
 #include <iostream>
 #include <random>
-#include <thread>
 
 #include "../include/ThreadPool.h"
 
