Resolve "Sliding window n fixed frames"

Closes #391 (closed)

demos/hello_wolf/yaml/hello_wolf_config.yaml

@@ -16,10 +16,7 @@ config:
       time_tolerance:     0.1
 
     tree_manager:
-      type: "TreeManagerSlidingWindow"
-      n_frames: -1
-      fix_first_frame: false
-      viral_remove_empty_parent: true
+      type: "none"
   
   solver:
     max_num_iterations: 100