code: def test_004_remove_image(self):
      total = self.client.get("/datastore/").json()["total"]
      response = self.client.delete(f"/datastore/?id={self.image_id}")
      assert response.status_code == 200
  
      current = self.client.get("/datastore/").json()["total"]
      assert current == total - 1
      time.sleep(1)
  
file_path: MONAILabel/tests/unit/endpoints/test_datastore.py
imports: import os
  import time
  import unittest
  from .context import BasicEndpointTestSuite
label_desc: Use image node_id 5 for calling the EndPointDatastore obj's underlying member method code with example usage: obj.test_004_remove_image() without return types