Use default chunk size

Author: kayceesrk

test/game_of_life_multicore.ml

@@ -47,7 +47,7 @@ let print g =
 let next pool =
   let g = !rg in
   let new_g = !rg' in
-  T.parallel_for pool ~chunk_size:(board_size/num_domains) ~start:0
+  T.parallel_for pool ~start:0
     ~finish:(board_size - 1) ~body:(fun x ->
       for y = 0 to board_size - 1 do
         new_g.(x).(y) <- next_cell g x y