Remove Jinja2 extensions
Remove Jinja2 extensions

They have been deprecaed and finally removed in 3.1.0:

> autoescape and with have been in the standard compiler for years now.
> The extensions do nothing. Make them issue a deprecation warning,
> for removal in 3.1.

https://github.com/pallets/jinja/issues/1203
https://jinja.palletsprojects.com/en/3.1.x/changes/#version-3-1-0

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