code: def test_remove_expressions(self):
      schema = {"key": str, "delta$": float, "business_line": str}
      data = [
          {
              "key": "A",
              "delta$": 46412.3804275,
          },
          {
              "key": "B",
              "delta$": 2317615.875,
          },
      ]
  
      table = Table(schema, index="key")
      table.update(data)
      table.remove(["A"])
      view = table.view(
          group_by=["business_line"],
          columns=["delta$", "alias"],
          expressions={
              "alias": '"delta$"',
          },
      )
  
      records = view.to_records()
      assert records == [
          {
              "__ROW_PATH__": [],
              "delta$": 2317615.875,
              "alias": 2317615.875,
          },
          {
              "__ROW_PATH__": [None],
              "delta$": 2317615.875,
              "alias": 2317615.875,
          },
      ]
  
imports: from perspective.table import Table
label_desc: Use image node_id 4 for calling the TestRemove obj's underlying member method code with example usage: obj.test_remove_expressions() without return types