code: def test_remove(self):
      self.do_fast_scan_test("PQ5x4fs", 320)
  
imports: import unittest
  import faiss
  import numpy
  from faiss.contrib.datasets import SyntheticDataset
  from common_faiss_tests import Randu10k
label_desc: Use image node_id 2 for calling the TestRemoveFastScan obj's underlying member method code with example usage: obj.test_remove() without return types