code: def test_matcher_remove_zero_operator(en_vocab):
      matcher = Matcher(en_vocab)
      pattern = [{"OP": "!"}]
      matcher.add("Rule", [pattern])
      doc = Doc(en_vocab, words=["This", "is", "a", "test", "."])
      matches = matcher(doc)
      assert len(matches) == 0
      assert "Rule" in matcher
      matcher.remove("Rule")
      assert "Rule" not in matcher
  
imports: import pytest
  from mock import Mock
  from spacy.matcher import Matcher
  from spacy.tokens import Doc, Span, Token
  from ..doc.test_underscore import clean_underscore
label_desc: Use image node_id 48 for calling a global function with example usage: test_matcher_remove_zero_operator(en_vocab) without return types