There's a closed pull request on the void-packages repository

e3: remove package
https://github.com/void-linux/void-packages/pull/48112

Description:
Upstream is dead. The only e3 source archive that I was able to find is http://ftp.uni-kl.de/pub/linux/gentoo/distfiles/9a/e3-2.82.tgz ~~This has a lower version than the version in the template.~~

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#### Testing the changes
- I tested the changes in this PR: kinda, one can't really test removed packages