Remove crfcut from core test

Author: bact

tests/core/test_tokenize.py

@@ -333,11 +333,6 @@ def test_sent_tokenize(self):
         with self.assertRaises(ValueError):
             sent_tokenize("ฉันไป กิน", engine="XX")  # engine does not exist
 
-        self.assertIsNotNone(
-            sent_tokenize(SENT_1, engine="crfcut")
-        )
-        self.assertIsInstance(sent_tokenize(SENT_1, engine="crfcut"), list)
-
     def test_subword_tokenize(self):
         self.assertEqual(subword_tokenize(None), [])
         self.assertEqual(subword_tokenize(""), [])