Implement Option to Disable Warning Log for Failed World Deletion

src/main/java/xyz/nucleoid/fantasy/Fantasy.java

@@ -49,6 +49,8 @@ public final class Fantasy {
     private final Set<ServerWorld> deletionQueue = new ReferenceOpenHashSet<>();
     private final Set<ServerWorld> unloadingQueue = new ReferenceOpenHashSet<>();
 
+    private static boolean logWorldDeletionFailure = true;
+
     static {
         ServerTickEvents.START_SERVER_TICK.register(server -> {
             Fantasy fantasy = get(server);
@@ -84,6 +86,21 @@ public static Fantasy get(MinecraftServer server) {
         return instance;
     }
 
+    /**
+     * Disables logging when a runtime world fails to delete.
+     * @see RuntimeWorldManager#delete(ServerWorld)
+     */
+    public static void disableWorldDeletionFailureLog() {
+        Fantasy.logWorldDeletionFailure = false;
+    }
+
+    /**
+     * Whether a warning should be logged when runtime world deletion fails.
+     */
+    public static boolean shouldLogWorldDeletionFailure() {
+        return Fantasy.logWorldDeletionFailure;
+    }
+
     private void tick() {
         Set<ServerWorld> deletionQueue = this.deletionQueue;
         if (!deletionQueue.isEmpty()) {

src/main/java/xyz/nucleoid/fantasy/RuntimeWorldManager.java

@@ -72,7 +72,10 @@ void delete(ServerWorld world) {
                 try {
                     FileUtils.deleteDirectory(worldDirectory);
                 } catch (IOException e) {
-                    Fantasy.LOGGER.warn("Failed to delete world directory", e);
+                    if (Fantasy.shouldLogWorldDeletionFailure()) {
+                        Fantasy.LOGGER.warn("Failed to delete world directory", e);
+                    }
+
                     try {
                         FileUtils.forceDeleteOnExit(worldDirectory);
                     } catch (IOException ignored) {