Remove Elixir v1.15 related TODOs

Author: josevalim

nx/lib/nx/defn/expr.ex

@@ -612,7 +612,7 @@ defmodule Nx.Defn.Expr do
           {nil, range}
 
         unroll when is_integer(unroll) and unroll > 0 ->
-          {internal, external} = split_range(range, size - rem(size, unroll))
+          {internal, external} = Range.split(range, size - rem(size, unroll))
           {{internal, 0..(unroll - 1)//1}, external}
 
         unroll ->
@@ -730,33 +730,6 @@ defmodule Nx.Defn.Expr do
     end)
   end
 
-  # TODO: Use Range.split/2 when we require Elixir v1.15+
-  defp split_range(first..last//step = range, split) when is_integer(split) do
-    if split >= 0 do
-      split_range(first, last, step, split)
-    else
-      split_range(first, last, step, Range.size(range) + split)
-    end
-  end
-
-  defp split_range(first, last, step, split) when first < last or (first == last and step > 0) do
-    if step > 0 do
-      mid = max(min(first + step * (split - 1), last), first - step)
-      {first..mid//step, (mid + step)..last//step}
-    else
-      {first..(first - step)//step, (last + step)..last//step}
-    end
-  end
-
-  defp split_range(last, first, step, split) do
-    if step < 0 do
-      mid = min(max(last + step * (split - 1), first), last - step)
-      {last..mid//step, (mid + step)..first//step}
-    else
-      {last..(last - step)//step, (first + step)..first//step}
-    end
-  end
-
   defp compatible_while!(file, line, initial, body) do
     if not Nx.compatible?(initial, body) do
       raise CompileError,

nx/lib/nx/serving.ex

@@ -768,8 +768,7 @@ defmodule Nx.Serving do
         end
       end)
 
-    # TODO: Use Process.monitor/2 on Elixir v1.15+
-    {pid, :erlang.monitor(:process, pid, alias: :demonitor)}
+    {pid, Process.monitor(pid, alias: :demonitor)}
   end
 
   defp run_hook(ref, size, result, hook) do
@@ -1038,8 +1037,7 @@ defmodule Nx.Serving do
 
     {preprocessed, info} = handle_preprocessing(preprocessing, input)
 
-    # TODO: Use Process.monitor/2 on Elixir v1.15+
-    ref = :erlang.monitor(:process, pid, alias: :demonitor)
+    ref = Process.monitor(pid, alias: :demonitor)
 
     size_or_unknown =
       case preprocessed do
@@ -1396,8 +1394,7 @@ defmodule Nx.Serving do
 
   @impl true
   def handle_info({__MODULE__, :proxy_monitor, pid, ref}, state) do
-    # TODO: Use Process.monitor/2 on Elixir v1.15+
-    :erlang.monitor(:process, pid, tag: {:proxy, ref})
+    Process.monitor(pid, tag: {:proxy, ref})
     {:noreply, state}
   end