fix: Prepares for IPooledEnumerable removal (#1548)

### Summary

- Removes `IPooledEnumerable` (non-generic)
- Changes `IPooledEnumerable<T>` so that  `Free()` is replaced with the `IDisposable` pattern

Projects/UOContent/Spells/Chivalry/DispelEvil.cs

@@ -55,7 +55,6 @@ namespace Server.Spells.Chivalry
                         queue.Enqueue(m);
                     }
                 }
-                eable.Free();
 
                 while (queue.Count > 0)
                 {

Projects/UOContent/Spells/Chivalry/NobleSacrifice.cs

@@ -46,8 +46,6 @@ namespace Server.Spells.Chivalry
                     }
                 }
 
-                eable.Free();
-
                 Caster.PlaySound(0x244);
                 Caster.FixedParticles(0x3709, 1, 30, 9965, 5, 7, EffectLayer.Waist);
                 Caster.FixedParticles(0x376A, 1, 30, 9502, 5, 3, EffectLayer.Waist);