This PR removes the `basic.conf` file.
In #10099 we suppressed some typo warnings that had cropped up in this
file, but it turns out we don't need the file at all.
Release Notes:
- N/A
Over time, I think we may end up having multiple services, so it seems like a good opportunity to name this one more specifically while the cost is low. It just seems like naming it "zed" and "zed-server" leaves it a bit open ended.