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/Spellweaving/ArcaneCircle.cs

@@ -103,13 +103,10 @@ namespace Server.Spells.Spellweaving
             {
                 if (item.Z + item.ItemData.CalcHeight == location.Z && IsValidTile(item.ItemID))
                 {
-                    eable.Free();
                     return true;
                 }
             }
 
-            eable.Free();
-
             return false;
         }
 
@@ -125,12 +122,9 @@ namespace Server.Spells.Spellweaving
                 if (m != Caster && m is PlayerMobile && Caster.CanBeBeneficial(m, false) &&
                     Math.Abs(spellWeaving - m.Skills.Spellweaving.Value) <= 20)
                 {
-                    eable.Free();
                     return true;
                 }
             }
-
-            eable.Free();
             return false;
         }
 
@@ -150,8 +144,6 @@ namespace Server.Spells.Spellweaving
                     pool.Enqueue(m);
                 }
             }
-
-            eable.Free();
             return pool;
         }
 

Projects/UOContent/Spells/Spellweaving/EssenceOfWind.cs

@@ -63,8 +63,6 @@ namespace Server.Spells.Spellweaving
                         new BuffInfo(BuffIcon.EssenceOfWind, 1075802, duration, m, $"{fcMalus}\t{ssiMalus}")
                     );
                 }
-
-                eable.Free();
             }
 
             FinishSequence();

Projects/UOContent/Spells/Spellweaving/Thunderstorm.cs

@@ -72,8 +72,6 @@ namespace Server.Spells.Spellweaving
                         new BuffInfo(BuffIcon.Thunderstorm, 1075800, duration, m, GetCastRecoveryMalus(m))
                     );
                 }
-
-                eable.Free();
             }
 
             FinishSequence();