remove unchangeable requirements

lib/cannery/ammo/ammo_group.ex

@@ -63,7 +63,7 @@ defmodule Cannery.Ammo.AmmoGroup do
     ammo_group
     |> cast(attrs, [:count, :price_paid, :notes, :staged, :ammo_type_id, :container_id])
     |> validate_number(:count, greater_than_or_equal_to: 0)
-    |> validate_required([:count, :staged, :ammo_type_id, :container_id, :user_id])
+    |> validate_required([:count, :staged, :ammo_type_id, :container_id])
   end
 
   @doc """
@@ -75,6 +75,6 @@ defmodule Cannery.Ammo.AmmoGroup do
   def range_changeset(ammo_group, attrs) do
     ammo_group
     |> cast(attrs, [:count, :staged])
-    |> validate_required([:count, :staged, :ammo_type_id, :container_id, :user_id])
+    |> validate_required([:count, :staged])
   end
 end

lib/cannery/ammo/ammo_type.ex

@@ -118,6 +118,6 @@ defmodule Cannery.Ammo.AmmoType do
   def update_changeset(ammo_type, attrs) do
     ammo_type
     |> cast(attrs, changeset_fields())
-    |> validate_required([:name, :user_id])
+    |> validate_required(:name)
   end
 end