Removed redundant args in _encode_payload method

[KrishnenduDG]

Well, was just going through the basic implementation of the whole jwt flow. Just then I realised that there was an extra and unused argument headers being passed in the _encode_payload method. Removed that from both the function definition and the function call.

[auvipy]

how can we verify this change?

[Copilot]

Pull Request Overview

Clean up the _encode_payload method by removing an unused headers parameter from its signature and call site.

• Removed the redundant headers argument from the internal payload encoding method.
• Updated the call to _encode_payload to no longer pass headers.

Comments suppressed due to low confidence (1)

jwt/api_jwt.py:149

• Update the docstring of _encode_payload to remove any references to the now-removed headers parameter so the documentation matches the signature.

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