Remove for loop with join

lab01/.gitignore

@@ -1,3 +1,4 @@
 encrypted
 decrypted
+example
 

lab01/main.c

@@ -176,10 +176,6 @@ int main(int argc, char *argv[]) {
 
     pthread_barrier_wait(&barrier);
 
-    for (int i = 0; i < workers_count; i++) {
-        pthread_join(workers[i]->id, NULL);
-    }
-
     pthread_barrier_destroy(&barrier);
     munmap(input, cfg.size);