Automated response: Smart de-cache does not seem to work for language cache

I was not able to confidently find the issue, but what I did see was that language cache is supposed to de-cache with smart de-cacheing, however it was not deleting the on-disk cache file in the caches directory when doing so; it was only invalidating smart cache.

This fix ensures that the language cache file also gets deleted. However again, I am not 100% sure yet this is the fix to the original bug. Will leave issue open for a bit until I can confirm whether the bug was actually fixed.

Closing as this is a trivial issue, and I don't really have time / resources right now to keep tabs on issues that only affect developers.