New comment by arp242 on void-packages repository

https://github.com/void-linux/void-packages/pull/32016#issuecomment-881950114

Comment:
Another thing that could potentially be done is removing the test data:

```
$ cd /usr/lib/go/src
$ du -h | tail -1
91M

$ find . -name '*_test.go' -delete
$ du -h | tail -1
78M

$ find . -name 'testdata' -exec rm -rf {} \+
$ du -h | tail -1
62M
```

Bringing the total down a further 29M to 182M. I think we also don't need the source for `cmd` for the reasons outlined above (which is 27M), but I'll have to test in the morning to make sure.