code: def test_manager_remove_delete_view(self, sentinel):
      s = sentinel(False)
  
      def delete_callback():
          s.set(True)
  
      make_table = {
          "id": 1,
          "name": "table1",
          "cmd": "table",
          "args": [data],
      }
      manager = PerspectiveManager()
      manager._process(make_table, self.post)
      make_view = {
          "id": 2,
          "table_name": "table1",
          "view_name": "view1",
          "cmd": "view",
      }
      manager._process(make_view, self.post)
  
      view = manager._get_view("view1")
      view.on_delete(delete_callback)
      view.remove_delete(delete_callback)
  
      delete_view = {
          "id": 3,
          "name": "view1",
          "cmd": "view_method",
          "method": "delete",
      }
  
      manager._process(delete_view, self.post)
  
      assert len(manager._views) == 0
      assert s.get() is False
  
imports: import json
  import time
  import numpy
  import pyarrow
  from datetime import datetime
  from functools import partial
  from pytest import raises
  from perspective import Table, PerspectiveError, PerspectiveManager
label_desc: Use image node_id 49 for calling the TestPerspectiveManager obj's underlying member method code with example usage: obj.test_manager_remove_delete_view(sentinel) without return types