The old /srv/zulip-npm-cache system has been unused for two
years (Zulip Server ≥ 7.0). We can just delete this directory.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit will allow us to pass the arguments in the
'clean...' functions when calling the `main` function (in
`provision`). It also changes args parsing
function location to `if __name__ == "__main__"` block as
we wouldn't need it to parse args when we call the
function.
We convert the `clean-unused-caches` script to a
python file so we can run it in provision by importing it
instead of running the script, hence saving some time.
