games/anki: Update to 24.04

• Support for offline builds has now been integrated, so a number of patches are no longer required.

• The same applies to some environment variables that are also no longer needed or have changed slightly regarding their purpose.

• The workaround introduced in bdcfffd8573e regarding issues with nVidia drivers was also merged by upstream and is therefore no longer required.

Changelog:

https://github.com/ankitects/anki/releases/tag/24.04