fix: RecycleQueue cannot extends and implements Iterable at the same …

…time (#2497)

Implementing and extending the iterable interface/mixin at the same time breaks Flame in the current beta channel (3.10...).

This PR removes the implementation of the interface to get flame ready for the next flutter release.

packages/flame/lib/src/components/core/recycled_queue.dart

@@ -21,7 +21,7 @@ import 'dart:math';
 ///
 /// Internally, the queue is backed by a circular list.
 class RecycledQueue<T extends Disposable> extends IterableMixin<T>
-    implements Iterable<T>, Iterator<T> {
+    implements Iterator<T> {
   RecycledQueue(this.factory, {int initialCapacity = 8})
       : _elements = List.generate(initialCapacity, (i) => factory()),
         _startIndex = -1,