Fix removing recipes from RecipeIterator

== AT ==
public net.minecraft.world.item.crafting.RecipeMap byKey

paper-server/src/main/java/org/bukkit/craftbukkit/inventory/RecipeIterator.java

@@ -9,6 +9,7 @@ import org.bukkit.inventory.Recipe;
 
 public class RecipeIterator implements Iterator<Recipe> {
     private final Iterator<Map.Entry<RecipeType<?>, RecipeHolder<?>>> recipes;
+    private RecipeHolder<?> currentRecipe; // Paper - fix removing recipes from RecipeIterator
 
     public RecipeIterator() {
         this.recipes = MinecraftServer.getServer().getRecipeManager().recipes.byType.entries().iterator();
@@ -21,11 +22,15 @@ public class RecipeIterator implements Iterator<Recipe> {
 
     @Override
     public Recipe next() {
-        return this.recipes.next().getValue().toBukkitRecipe();
+        // Paper start - fix removing recipes from RecipeIterator
+        this.currentRecipe = this.recipes.next().getValue();
+        return this.currentRecipe.toBukkitRecipe();
+        // Paper end - fix removing recipes from RecipeIterator
     }
 
     @Override
     public void remove() {
+        MinecraftServer.getServer().getRecipeManager().recipes.byKey.remove(this.currentRecipe.id()); // Paper - fix removing recipes from RecipeIterator
         this.recipes.remove();
     }
 }