www/py-requests: Update to 2.25.1

• Patches removed were incorporated upstream.
• Update WWW with current project's information.

Changelog: https://github.com/psf/requests/blob/v2.25.1/HISTORY.md

PR: 250941
Approved by: koobs (maintainer, implicit)
MFH: 2021Q2

Co-authored-by: Olivier Cochard <olivier@FreeBSD.org>
Co-authored-by: Danilo G. Baio <dbaio@FreeBSD.org>