mypy: Remove use of ValuesQuerySet and QuerySetAny.

This was made unnecessary in django-stubs 5.0.1 and mypy 1.10.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

docs/testing/mypy.md

@@ -128,24 +128,18 @@ needing to do an explicit annotation.
 
 When declaring the types for functions that accept a `QuerySet`
 object, you should always supply the model type that it accepts as the
-type parameter.
+first type parameter.
 
 ```python
 def foo(user: QuerySet[UserProfile]) -> None:
     ...
 ```
 
-In cases where you need to type the return value from `.values_list`
-or `.values` on a `QuerySet`, you can use the special
-`django_stubs_ext.ValuesQuerySet` type.
-
-For `.values_list`, the second type parameter will be the type of the
-column.
+For `.values_list`, supply the type of the column as the second type
+parameter.
 
 ```python
-from django_stubs_ext import ValuesQuerySet
-
-def get_book_page_counts() -> ValuesQuerySet[Book, int]:
+def get_book_page_counts() -> QuerySet[Book, int]:
     return Book.objects.filter().values_list("page_count", flat=True)
 ```
 
@@ -153,15 +147,13 @@ For `.values`, we prefer to define a `TypedDict` containing the
 key-value pairs for the columns.
 
 ```python
-from django_stubs_ext import ValuesQuerySet
-
 class BookMetadata(TypedDict):
     id: int
     name: str
 
 def get_book_meta_data(
     book_ids: List[int],
-) -> ValuesQuerySet[Book, BookMetadata]:
+) -> QuerySet[Book, BookMetadata]:
     return Book.objects.filter(id__in=book_ids).values("name", "id")
 ```