Remove expected failures that fail because the method they're overriding doesn't exist

wagtail/search/tests/elasticsearch_common_tests.py

@@ -1,4 +1,3 @@
-import unittest
 from datetime import date
 from io import StringIO
 
@@ -207,14 +206,3 @@ class ElasticsearchCommonSearchBackendTests(BackendTests):
         in_jan = models.Book.objects.filter(publication_date__month=1)
         with self.assertRaises(FilterError):
             self.backend.search(MATCH_ALL, in_jan)
-
-    # Elasticsearch always does prefix matching on `partial_match` fields,
-    # even when we don’t use `Prefix`.
-    @unittest.expectedFailure
-    def test_incomplete_term(self):
-        super().test_incomplete_term()
-
-    # Elasticsearch does not accept prefix for multiple words
-    @unittest.expectedFailure
-    def test_prefix_multiple_words(self):
-        super().test_prefix_multiple_words()

wagtail/search/tests/test_db_backend.py

@@ -51,11 +51,6 @@ class TestDBBackend(BackendTests, TestCase):
     def test_search_callable_field(self):
         super().test_search_callable_field()
 
-    # Database backend always uses `icontains`, so always autocomplete
-    @unittest.expectedFailure
-    def test_incomplete_term(self):
-        super().test_incomplete_term()
-
     # Database backend always uses `icontains`, so always autocomplete
     @unittest.expectedFailure
     def test_incomplete_plain_text(self):