remove redundant asserts

tests/model_fields_/test_embedded_model.py

@@ -254,22 +254,18 @@ def test_exists_subquery(self):
             author__name=OuterRef("author__name"), author__address__city="Boston"
         )
         queryset = Book.objects.filter(Exists(subquery)).order_by("name")
-        self.assertEqual(queryset.count(), 3)
         self.assertQuerySetEqual(queryset, ["Book 2", "Book 3", "Book 4"], lambda book: book.name)
 
     def test_in_subquery(self):
         subquery = Book.objects.filter(author__age__gt=35).values("author__name")
         queryset = Book.objects.filter(author__name__in=subquery).order_by("name")
-        self.assertEqual(queryset.count(), 3)
         self.assertQuerySetEqual(queryset, ["Book 2", "Book 3", "Book 4"], lambda book: book.name)
 
     def test_exists_with_foreign_object(self):
         subquery = Library.objects.filter(best_seller=OuterRef("name"))
         queryset = Book.objects.filter(Exists(subquery))
-        self.assertEqual(queryset.count(), 1)
         self.assertEqual(queryset.first().name, "Book 1")
 
     def test_foreign_field_with_ranges(self):
         queryset = Library.objects.filter(books__author__age__range=(25, 35))
-        self.assertEqual(queryset.count(), 1)
         self.assertEqual(queryset.first().name, "Central Library")