Revert "Include modified files in the generated matrix zip"

[michaelarnauts]

Reverts #20

This seems to have an issue when submitting the actual addon. I think that the git stash create causes the actual commit to fail. I'll probably have to git stash pop or find a better solution.

I think it's best to revert this for now, so the Github Action works again.

[michaelarnauts]

@romanvm or @enen92 could you merge this pr so my change is reverted? i think it's more important that the pr's to the repo are correct for now :)