Remove redundant subclass method annotations

[brianhelba]

These methods will be inherited from the parent class unchanged.

[brianhelba]

@intgr PTAL.

[Copilot]

Pull request overview

This pull request removes redundant method type annotations from subclasses in Django REST Framework stubs. When a subclass doesn't override a method's implementation, the type annotation is automatically inherited from the parent class, making explicit re-declaration unnecessary. Additionally, the PR improves type specificity in BasePagination.get_schema_fields by changing its return type from list[Any] to list[CoreAPIField].

Changes:

• Removed redundant __new__ and __class_getitem__ annotations from BaseSerializer that are inherited from Field
• Removed unused typing_extensions.Self import from serializers.pyi
• Improved type specificity of BasePagination.get_schema_fields return type from list[Any] to list[CoreAPIField]
• Removed redundant paginate_queryset, get_paginated_response_schema, and get_schema_fields method annotations from pagination subclasses

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
rest_framework-stubs/serializers.pyi	Removed redundant __new__ and __class_getitem__ methods from BaseSerializer and the now-unused Self import
rest_framework-stubs/pagination.pyi	Improved BasePagination.get_schema_fields return type specificity and removed redundant method annotations from PageNumberPagination, LimitOffsetPagination, and CursorPagination subclasses

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