fixed waiting till heat death problem

mechanics.c

@@ -82,7 +82,6 @@ void mechanics(universe_t* uni){
       body_1 = uni->bodies[i];
       scaled_speed = vec2_scale(&body_1.speed, 1.0 / simx);
       body_1.position = vec2_sum(&body_1.position, &scaled_speed);
-      printf("aaa");
       if (i < uni->num_bodies - 1) {
         for (unsigned int y = i + 1; y < uni->num_bodies; y++) {
           body_2 = uni->bodies[y];